Curriculum Vitae

Richard F. Kay

Duke Box 90383, Durham, NC 27708-0383 +1 919 684 2143 (office)
(email)
Education:

Areas of Research

Evolution of primate adaptations, anthropoid adaptations,phylogenetics, paleoecology

Areas of Interest

South America
Argentina
Peru
Bolivia
Dominican Republic

Professional Experience / Employment History

Visiting Positions
Scientific Researcher, University of Montpellier II, 2004 - 2005
Scientific Researcher, Kyoto University Primate Center, 1999
Adjunct Professor, University of North Carolina, 1995 - 1998
Research Scientist, National Museum of Natural History (Smithsonian Institution), 1987
Visiting Professor, Stony Brook University, 1980

Awards, Honors, and Distinctions

Professional Service

  Service as Departmental Officer

  Departmental Committees/Service

  University Committees/Service

  Service to the Professional Community

  Journals/Volumes Refereed

  NSF Reviews And Panels

  Editorial Positions

  Other Service

Lectures

  Invited Lectures:

  Other:
Doctoral Theses Directed

Publications

Books

  1. Vizcaíno, SF; Kay, RF; Bargo, MS, Early Miocene Paleobiology in Patagonia: High-latitude paleocommunities of the Santa Cruz Formation (2012), pp. 370, Cambridge University Press.

  2. Madden, RH; Vucetich, G; Carlini, AA; Kay, RF, The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia (2010), pp. 448, University of Cambridge Press.

  3. Simons, EL; Ankel-Simons, F; Chatrath, PS; Kay, RS; Williams, B; Fleagle, JG; Gebo, DL; Beard, CK; Dawson, M; Tattersall, I; Rose, KD, Outrage at high price paid for a fossil., Nature, vol. 460 no. 7254 (July, 2009), pp. 456.

  4. Ross, C; Kay, RF, Anthropoid Origins (January, 2004), pp. 749 pages, Springer Science & Business Media.

  5. Ross, C.F. and R.F. Kay, Anthropoid Origins: New Visions (Advances in Primatology) (2004), pp. 747, Kluwer/Plenum.

  6. Ross, CF; Kay, RF, Anthropoid Origins: New Visions (2004), pp. 749, Kluwer/Plenum Publishers.

  7. Kirk, EC; Cartmill, M; Kay, RF; Lemelin, P, Comment on "Grasping primate origins"., Science (New York, N.Y.), vol. 300 no. 5620 (May, 2003), pp. 741.

  8. Plavcan, JM; Kay, RF; Jungers, WL; van Schaik, C, Reconstructing Behavior in the Primate Fossil Record, in Advances in Primatology (2001), pp. 437, Kluwer/Plenum Publishers.

  9. Kay, RF; Madden, RH; Ciffeli, RL; Flynn, JJ, Vertebrate Paleontology in the Neotropics. (1997), pp. 592, Smithsonian Institution Press.

  10. Fleagle, JG; Kay, RF, Anthropoid Origins: The Fossil Evidence (1994), pp. 708, Plenum Press.

Book Sections/Chapters

  1. Kay, RF; Grine, FE, Tooth morphology, wear and diet in australopithecus and paran thropus from Southern Africa, in Evolutionary History of the "Robust" Australopithecines (January, 2017), pp. 427-447.

  2. Kay, R.F. Meldrum, DJ Takai, M., Evolutionary Biology and Conservation of Titis, Sakis and Uacaris., in Evolutionary Biology and Conservation of Titis, Sakis and Uacaris, edited by Veiga, L Barnett, AA Ferrari, SF Norconk, MA (2013), pp. 3-12, Cambridge University Press.

  3. Kay, RF; Meldrum, DJ; Takai, M, Pitheciidae and other platyrrhine seed predators, in Evolutionary Biology and Conservation of Titis, Sakis and Uacaris., edited by Veiga, L; Barnett, AA; Ferrari, SF; Norconk, MA (2013), pp. 3-12, Cambridge University Press.

  4. Kay, RF; Perry, JMG; Malinzak, MD; Allen, KL; Kirk, EC; Plavcan, JM; Fleagle, JG, The paleobiology of Santacrucian primates, in Early Miocene Paleobiology in Patagonia: High-latitude paleocommunities of the Santa Cruz Formation, edited by Vizcaíno, SF; Kay, RF; Bargo, MS (2012), pp. 306-330, Cambridge University Press.

  5. Kay, RF; Vizcaíno, SF; Bargo, MS, A review of the paleoenvironment and paleoecology of the Miocene Santa Cruz Formation, in Early Miocene Paleobiology in Patagonia: High-Latitude Paleocommunities of the Santa Cruz Formation, edited by Vizcaíno, SF; Kay, RF; Bargo, MS (2012), pp. 331-364, Cambridge University Press.

  6. Vizcaíno, SF; Kay, RF; Bargo, MS, Background for a paleoecological study of the Santa Cruz Formation (late Early Miocene) on the Atlantic Coast of Patagonia, in Early Miocene Paleobiology in Patagonia: High-latitude paleocommunities of the Santa Cruz Formation, edited by Vizcaíno, SF; Kay, RF; Bargo, MS (2012), pp. 1-22, Cambridge University Press.

  7. Kay, RF, A New Primate from the Early Miocene of Gran Barranca, Chubut Province, Argentina: Paleoecological Implications, in The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia, edited by Madden, RH; Vucetich, G; Carlini, AA; Kay, RF (2010), pp. 220-239, Cambridge University Press.

  8. Madden, RH; Carlini, AA; Vucetich, MG; Kay, RF, Preface to The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia, in The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia, edited by Madden, RH; Carlini, AA; Vucetich, MG; Kay, RF (2010), pp. ix-x, Cambridge University Press.

  9. Ré, GH; Bellosi, ES; Heizler, M; Vilas, JF; Madden, RH; Carlini, AA; Kay, RF; Vucetich, MG, A geochronology for the Sarmiento Formation at Gran Barranca, in The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia, edited by Madden, RH; Vucetich, G; Carlini, AA; Kay, RF (2010), pp. 46-60, Cambridge University Press.

  10. Madden, RH; Carlini, AA; Vucetich, MG; Kay, RF, Gran Barranca: a twenty-three million year record of Middle-Cenozoic faunal evolution in Patagonia, in The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia, edited by Madden, RH; Vucetich, G; Carlini, AA; Kay, RF (2010), pp. 423-449, Cambridge University Press.

  11. Madden, RH; Carlini, AA; Vucetich, MG; Kay, RF, Gran Barranca: a twenty-three million year record of Middle-Cenozoic faunal evolution in Patagonia, in The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia, edited by Madden, RH; Vucetich, G; Carlini, AA; Kay, RF (2010), Cambridge University Press.

  12. Teaford, M; Ungar, P; Kay, RF, Molar shape and molar microwear in the Koobi Fora monkeys: ecomorphological implications, in Koobi Fora Research Project, Volume VI, The Fossil Monkeys, edited by Jablonski, N; Leakey, MG (2008), pp. 337-358, California Academy of Sciences.

  13. Kay, R.F., B.A. Williams, C. Ross, M. Takai, and N. Shigehara, Anthropoid origins: a phylogenetic analysis, in Anthropoid Origins: New Visions, edited by C.F. Ross and R.F. Kay (2004), pp. 91-135, Kluwer/Plenum: New York.

  14. Kay, RF; Williams, BA; Ross, CF; Takai, M; Shigehara, N, Anthropoid origins: a phylogenetic analysis, in Anthropoid Origins: New Visions, edited by Ross, CF; Kay, RF (2004), pp. 91-135, Kluwer/Plenum.

  15. Kirk, EC; Kay, RF, The evolution of high visual acuity in the Anthropoidea, in Anthropoid Origins: New Visions, edited by Ross, CF; Kay, RF (2004), pp. 539-602, Kluwer/Plenum Publishing.

  16. Ross, CF; Kay, R, Anthropoid Origins: Retrospective and Prospective, in Anthropoid Origins: New Visions, edited by Ross, CF; Kay, RF (2004), pp. 699-737, Kluwer/Plenum Publishing.

  17. Ross, CF; Kay, RF, Evolving perspectives on Anthropoidea, in Anthropoid Origins: New Visions, edited by Ross, CF; Kay, RF (2004), pp. 3-41, Kulwer/Plenum.

  18. Kay, RF; Williams, BA; Anaya, F, The adaptations of Branisella boliviana, the earliest South American monkey, in Reconstructing Behavior in the Primate Fossil Record, edited by Plavcan, JM; van Schaik, C; Kay, RF; Jungers, WL (2002), pp. 339-370, Kluwer Academic/Plenum Publishers.

  19. Plavcan, J. M.Kay, R. F.Jungers, W. L.van Schaik, C., Reconstructing behavior in the fossil record, in Reconstructing Behavior in the Primate Fossil Record, edited by Plavcan, J. M.Kay, R. F.Jungers, W. L.van Schaik, C. (2001).

  20. Kay, RF, Teeth, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by Delson, E; Tattersall, I; Couvering, JAV; Brooks, A (2000), pp. 695-703, Garland Pub. Co..

  21. Kay, RF, Parapithecidae, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by Delson, E; Tattersall, I; VanCouvering, JA; Brooks, A (2000), pp. 545-548, Garland Pub. Co..

  22. Kay, RF, Diet, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by Delson, E; Tattersall, I; VanCouvering, JA; Brooks, A (2000), pp. 208-212, Garland Pub. Co..

  23. Kay, RF; Delson, E, Oligopithecidae, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by Delson, E; Tattersall, I; VanCouvering, JA; Brooks, A (2000), pp. 490-493, Garland Pub. Co..

  24. Kay, RF; Van Couvering, JA, Fayum, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by Delson, E; Tattersall, I; VanCouvering, JA; Brooks, A (2000), pp. 265-267, Garland Pub. Co.

  25. Van Couvering, JA; Kay, RF, Oligocene, in Encyclopedia of Evolution and Prehistory, 2nd Edition, 2nd Edition, edited by Delson, E; Tattersall, I; VanCouvering, JA; Brooks, A (2000), pp. 489-490, Garland Pub. Co.

  26. Kay, R.F. and D.J. Meldrum, A new small platyrrhine and the phyletic position of Callitrichinae, in Vertebrate Paleontology in the Neotropics, edited by R.F. Kay, et al. (1997), pp. 435-458, Smithsonian Institution Press: Washington, D.C..

  27. Fleagle, JG; Kay, RF, Platyrrhines, catarrhines and the fossil record, in New World Primates: Ecology, Evolution and Behavior, edited by Kinzey, WG (1997), pp. 3-24, Aldine.

  28. Fleagle, JG; Kay, RF; Anthony, MRL, Fossil New World monkeys, in Mammalian Evolution in the Neotropics, edited by Kay, RF; Madden, RH; Cifelli, RL; Flynn, JJ (1997), pp. 473-495, Smithsonian Institution Press.

  29. Kay, RF; Madden, RH, Paleogeography and paleoecology, in Mammalian Evolution in the Neotropics, edited by Kay, RF; Madden, RH; Cifelli, RL; Flynn, JJ (1997), pp. 520-550, Smithsonian Institution Press.

  30. Kay, RF; Meldrum, DJ, A new small platyrrhine from the Miocene of Colombia and the phyletic position of Callitrichinae, in Vertebrate Paleontology in the Neotropics, edited by Kay, RF; Madden, RH; Cifelli, RL; Flynn, JJ (1997), pp. 435-458, Smithsonian Institution Press.

  31. Kay, RF; Ungar, P, Dental evidence for diet in some Miocene catarrhines with comments on the effects of phylogeny on the interpretation of adaptation, in Function, Phylogeny and Fossils: Miocene Hominoids and Great Ape and Human Origins, edited by Begun, DR; Ward, C; Rose, M (1997), pp. 131-151, Plenum Press.

  32. Madden, RH; Guerrero, J; Kay, RF; Flynn, JJ; Swisher III, CC; Walton, AH, The Laventan Stage and Laventan Age: New chronostratigraphic and geochronologic units for the Miocene of South America, in Vertebrate Paleontology in the Neotropics., edited by Kay, RF; Madden, RH; Cifelli, RL; Flynn, JJ (1997), pp. 499-519, Smithsonian Institution Press.

  33. Meldrum, DJ; Kay, RF, The postcranial skeleton of Miocene platyrrhine primates, in Vertebrate Paleontology in the Neotropics, edited by Kay, RF; Madden, RH; Cifelli, RL; Flynn, JJ (1997), pp. 459-472, Smithsonian Institution Press.

  34. Kay, R.F. and B.A. Williams, Dental evidence for anthropoid origins., in Anthropoid Origins, edited by J.G. Fleagle and R.F. Kay (1994), pp. 361-446, Plenum Press: New York.

  35. Fleagle, J.G. and R.F. Kay, Anthropoid origins: Past, present, and future., in Anthropoid Origins, edited by J.G. Fleagle and R.F. Kay, vol. 675-698 (1994), Plenum Press: New York.

  36. Fleagle, JG; Kay, RF, Anthropoid origins: past, present, and future., in Anthropoid Origins: The Fossil Evidence, edited by Fleagle, JG; Kay, RF (1994), pp. 675-698, Plenum Press.

  37. Kay, RF; Williams, BA, Dental evidence for anthropoid origins., in Anthropoid Origins: The Fossil Evidence, edited by Fleagle, JG; Kay, RF (1994), pp. 361-446, Plenum Press.

  38. Kay, RF; Williams, BA, Dental evidence for anthropoid origins, vol. Suppl. 14 (1992), pp. 98.

  39. Rasmussen, DT; Kay, RF, A Miocene Anhinga from Colombia, and comments on the zoogeographic relationships of South America's Tertiary avifanua, in Avian Paleontology, Special Publication, Nat. Hist. Mus. of Los Angeles County, Los Angeles: Los Angeles, edited by Campell, KE (1992), pp. 225-230, Special Publication, Nat. Hist. Mus. of Los Angeles County, Los Angeles.

  40. Kay, RF; Grine, FE, Tooth Morphology, wear, and diet in Austrolopithecus and Paranthropus., in Evolutionary History of the "Robust" Austrolopithecines, The Evolutionary History of the Robust Austrolopithecus, edited by Grine, FE (1989), pp. 427-447, Aldine de Gruyter.

  41. Kay, RF, Parapithecidae, in Encyclopedia of Human Evolution and Prehistory, edited by Tattersal, I; Delson, E; VanCouvering, J (1988), pp. 440-443, Garland Pub..

  42. Kay, RF, Teeth, in Encyclopedia of Human Evolution and Prehistory, edited by Tattersal, I; Delson, E; VanCouvering, J (1988), pp. 571-578, Garland Pub..

  43. Kay, RF, Diet, in Encyclopedia of Human Evolution and Prehistory, edited by Tattersal, I; Delson, E; VanCouvering, J (1988), pp. 155-159, Garland Pub..

  44. Kay, RF, Oligocene, in Encyclopedia of Human Evolution and Prehistory, edited by Tattersal, I; Delson, E; VanCouvering, J (1988), pp. 392-394, Garland Pub..

  45. Kay, RF, Fayum, in Encyclopedia of Human Evolution and Prehistory, edited by Tattersal, I; Delson, E; VanCouvering, J (1988), pp. 205-206, Garland Pub..

  46. Fleagle, JG; Kay, RF, The paleobiology of catarrhines, in Ancestors: The Hard Evidence, edited by Delson, E (1985), pp. 23-36, Alan R. Liss, Inc..

  47. Kay, RF, On the use of anatomical features to infer foraging behavior in extinct primates, in Adaptations for Foraging in Nonhuman Primates, edited by Cant, J; Rodman, P (1984), pp. 21-53, Columbia University Press.

  48. Kay, RF; Covert, HH, Anatomy and behaviour of extinct primates., in Food Acquisition and Processing in Primates, edited by Chivers, DJ; Wood, BA; Bilsborough, A (1984), pp. 467-508, Plenum Press.

  49. Fleagle, JG; Kay, RF, New interpretations of the phyletic position of Oligocene hominoids, in New Interpretations of Ape and Human Ancestry, edited by Ciochon, RL; Corruccini, RS (1983), pp. 181-210, Plenum Press.

  50. Kay, RF; Simons, EL, A reassessment of the relationship between later Miocene and subsequent Hominoidea, in New Interpretations of Ape and Human Ancestry, edited by Ciochon, RL; Corruccini, RS (1983), pp. 577-624, Plenum Press.

  51. Kay, RF, Ramapithecines and Human Origins, in McGraw-Hill Yearbook of Science and Technology (1982), pp. 1-11.

  52. Kay, RF; Simons, EL, Apidium and Parapithecus, in McGraw-Hill Yearbook of Science and Technology, McGraw-Hill Yearbook of Science and Technology (1981), pp. 103-105.

  53. Simons, EL; Kay, RF, Aegyptopithecus and Propliopithecus, in McGraw-Hill Yearbook of Science and Technology, McGraw-Hill Yearbook of Science and Technology (1981), pp. 77-80.

  54. Kay, RF, Platyrrhine origins: a reappraisal of the dental evidence., in Evolutionary Biology of the New World Monkeys and Continental Drift, edited by Ciochon, R; Chiarelli, B (1980), pp. 159-188, Plenum Press.

  55. Kay, R.F. and W.L. Hylander, The dental structure of mammalian folivores with special reference to primates and Phalangeroidea (Marsupialia), in The Ecology of Arboreal Folivores, edited by G.G. Montgomery (1978), pp. 173 - 191, Smithsonian Institution Press: Washington, D. C..

  56. Cartmill, M; Kay, RF, Craniodental morphology, tarsier affinities, and primate suborders, in Recent Advances in Primatology: Evolution, edited by Chivers, DJ; Joysey, KA (1978), pp. 205-214, Academic Press.

  57. Fleagle, JG; Kay, RF, New interpretations of the phyletic position of Oligocene hominoids, in New Interpretations of Ape and Human Ancestry, edited by Ciochon, RL; Corruccini, RS (1978), pp. 181-210, Plenum Press.

  58. Kay, RF, Molar structure and diet in extant Cercopithecoidea, in Development, Function and Evolution of Teeth, edited by Butler, PM; Joysey, K (1978), pp. 309-339, Academic Press.

  59. Kay, RF; Hylander, WL, The dental structure of mammalian folivores wiht special reference to primates and Phalangeroidea (Marsupialia), in The Ecology of Arboreal Folivores, edited by Montgomery, GG (1978), pp. 173-191, Smithsonian Institution Press.

  60. Kay, RF; Hiiemae, KM, Mastication in Galago crassicaudatus, a cinefluorographic and occlusal study, in Prosimian Biology, edited by Martin, RD; Doyle, GA; Walker, AC (1974), pp. 501-530, Duckworth.

  61. Hiiemae, KM; Kay, RF, Evolutionary trends in the dynamics of primate mastication, in Symp. Fourth Int. Cong. Primatology, Vol 3: Craniofacial Biology of Primates, Symp. Fourth Int. Cong. Primatology, Vol 3: Craniofacial Biology of Primates, edited by Zingeser, MR, vol. 3 (1973), pp. 28-64, Karger.

  62. Hiiemae, KM; Kay, RF, Evolutionary trends in the dynamics of primate mastication., vol. 3 (1973), pp. 28-64.

Refereed Publications

  1. Morse, PE; Pampush, JD; Kay, RF, Dental topography of the Oligocene anthropoids Aegyptopithecus zeuxis and Apidium phiomense: Paleodietary insights from analysis of wear series., Journal of human evolution, vol. 180 (July, 2023), pp. 103387.

  2. Pampush, JD; Morse, PE; Fuselier, EJ; Skinner, MM; Kay, RF, Sign-oriented Dirichlet Normal Energy: Aligning Dental Topography and Dental Function in the R-package molaR, Journal of Mammalian Evolution, vol. 29 no. 4 (December, 2022), pp. 713-732.

  3. Vizcaíno, SF; Bargo, MS; Pérez, ME; Aramendía, I; Cuitiño, JI; Monsalvo, ES; Vlachos, E; Noriega, JI; Kay, RF, Fossil vertebrates of the early-middle Miocene Cerro Boleadoras Formation, northwestern Santa Cruz Province, Patagonia, Argentina, Andean Geology, vol. 49 no. 3 (September, 2022), pp. 382-422.

  4. Lundeen, IK; Kay, RF, Unique nasal turbinal morphology reveals Homunculus patagonicus functionally converged on modern platyrrhine olfactory sensitivity., Journal of human evolution, vol. 167 (June, 2022), pp. 103184.

  5. Fleagle, JG; Gladman, JT; Kay, RF, A New Humerus of Homunculus patagonicus, a Stem Platyrrhine from the Santa Cruz Formation (Late Early Miocene), Santa Cruz Province, Argentina, Ameghiniana, vol. 59 no. 1 (January, 2022), pp. 78-96.

  6. Palazzesi, L; Vizcaíno, SF; Barreda, VD; Cuitiño, JI; del Río, CJ; Goin, F; González Estebenet, MS; Guler, MV; Gandolfo, MA; Kay, R; Parras, A; Reguero, MA; Zamaloa, MDC, Reconstructing Cenozoic Patagonian biotas using multi-proxy fossil records, Journal of South American Earth Sciences, vol. 112 (December, 2021).

  7. Kay, RF; Vizcaíno, SF; Bargo, MS; Spradley, JP; Cuitiño, JI, Paleoenvironments and paleoecology of the Santa Cruz Formation (early-middle Miocene) along the Río Santa Cruz, Patagonia (Argentina), Journal of South American Earth Sciences, vol. 109 (August, 2021), pp. 103296-103296, Elsevier BV.

  8. Kay, RF, Leonard B. Radinsky (1937–1985), Radical Biologist, Journal of Mammalian Evolution, vol. 28 no. 1 (March, 2021), pp. 7-14.

  9. Vizcaíno, SF; Bargo, MS; Kay, RF; Raigemborn, MS, The record of the typothere Pachyrukhos (Mammalia, Notoungulata) and the Chinchillid Prolagostomus (Mammalia, Rodentia) in the Santa Cruz Formation (early-middle Miocene) south to the Río Coyle, Patagonia, Argentina, Publicacion Electronica de la Asociacion Paleontologica Argentina, vol. 21 no. 2 (January, 2021), pp. 1-15.

  10. Cuitiño, JI; Raigemborn, MS; Bargo, MS; Vizcaíno, SF; Muñoz, NA; Kohn, MJ; Kay, RF, Insights on the controls on floodplain-dominated fluvial successions: A perspective from the early–middle miocene santa cruz formation in río chalía (patagonia, argentina), Journal of the Geological Society, vol. 178 no. 4 (January, 2021), pp. jgs2020-188, Geological Society of London.

  11. Rodríguez-Gómez, G; Cassini, GH; Palmqvist, P; Bargo, MS; Toledo, N; Martín-González, JA; Muñoz, NA; Kay, RF; Vizcaíno, SF, Testing the hypothesis of an impoverished predator guild in the Early Miocene ecosystems of Patagonia: An analysis of meat availability and competition intensity among carnivores, Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 554 (September, 2020).

  12. Trayler, RB; Kohn, MJ; Bargo, MS; Cuitiño, JI; Kay, RF; Strömberg, CAE; Vizcaíno, SF, Patagonian Aridification at the Onset of the Mid-Miocene Climatic Optimum, Paleoceanography and Paleoclimatology, vol. 35 no. 9 (September, 2020), American Geophysical Union (AGU).

  13. Li, P; Morse, PE; Kay, RF, Dental topographic change with macrowear and dietary inference in Homunculus patagonicus., Journal of human evolution, vol. 144 (July, 2020), pp. 102786.

  14. Valenta, K; Daegling, DJ; Nevo, O; Ledogar, J; Sarkar, D; Kalbitzer, U; Bortolamiol, S; Omeja, P; Chapman, CA; Ayasse, M; Kay, R; Williams, B, Fruit Selectivity in Anthropoid Primates: Size Matters, International Journal of Primatology, vol. 41 no. 3 (June, 2020), pp. 525-537.

  15. Trayler, RB; Schmitz, MD; Cuitiño, JI; Kohn, MJ; Bargo, MS; Kay, RF; Strömberg, CAE; Vizcaíno, SF, An improved approach to age-modeling in deep time: Implications for the Santa Cruz Formation, Argentina, Bulletin of the Geological Society of America, vol. 132 no. 1-2 (January, 2020), pp. 233-244.

  16. Plavcan, JM; Ward, CV; Kay, RF; Manthi, FK, A diminutive Pliocene guenon from Kanapoi, West Turkana, Kenya., Journal of human evolution, vol. 135 (October, 2019), pp. 102623.

  17. Kay, RF; Gonzales, LA; Salenbien, W; Martinez, J-N; Cooke, SB; Valdivia, LA; Rigsby, C; Baker, PA, Parvimico materdei gen. et sp. nov.: A new platyrrhine from the Early Miocene of the Amazon Basin, Peru., Journal of human evolution, vol. 134 (September, 2019), pp. 102628.

  18. Pampush, JD; Crowell, J; Karme, A; Macrae, SA; Kay, RF; Ungar, PS, Technical note: Comparing dental topography software using platyrrhine molars., American journal of physical anthropology, vol. 169 no. 1 (May, 2019), pp. 179-185.

  19. Spradley, JP; Glazer, BJ; Kay, RF, Mammalian faunas, ecological indices, and machine-learning regression for the purpose of paleoenvironment reconstruction in the Miocene of South America, Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 518 (March, 2019), pp. 155-171.

  20. Gonzales, LA; Malinzak, MD; Kay, RF, Intraspecific variation in semicircular canal morphology-A missing element in adaptive scenarios?, American journal of physical anthropology, vol. 168 no. 1 (January, 2019), pp. 10-24.

  21. Bhandari, A; Kay, RF; Williams, BA; Tiwari, BN; Bajpai, S; Hieronymus, T, Correction: First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India., PloS one, vol. 14 no. 5 (January, 2019), pp. e0217960.

  22. Fernicola, JC; Vizcaíno, SF; Susana Bargo, M; Kay, RF; Cuitiño, JI, Analysis of the Early-Middle Miocene mammal associations at the Río Santa Cruz (Patagonia, Argentina), Publicacion Electronica de la Asociacion Paleontologica Argentina, vol. 19 no. 2 (January, 2019), pp. 239-259.

  23. Fernicola, JC; Bargo, MS; Vizcaíno, SF; Kay, RF, Historical background for a revision of the paleontology of the Santa Cruz formation (Early–Middle Miocene) along the rÍo Santa Cruz, Patagonia, Argentina, Publicacion Electronica de la Asociacion Paleontologica Argentina, vol. 19 no. 2 (January, 2019), Asociacion Paleontologica Argentina.

  24. Kay, RF; Perry, JMG, New primates from the Río Santa Cruz and Río Bote (Early-Middle Miocene), Santa Cruz Province, Argentina, Publicacion Electronica de la Asociacion Paleontologica Argentina, vol. 19 no. 2 (January, 2019), pp. 230-238.

  25. Pampush, JD; Spradley, JP; Morse, PE; Griffith, D; Gladman, JT; Gonzales, LA; Kay, RF, Adaptive wear-based changes in dental topography associated with atelid (Mammalia: Primates) diets, Biological Journal of the Linnean Society, vol. 124 no. 4 (August, 2018), pp. 584-606, Oxford University Press (OUP).

  26. Kay, RF, 100 years of primate paleontology., American journal of physical anthropology, vol. 165 no. 4 (April, 2018), pp. 652-676.

  27. Bhandari, A; Kay, RF; Williams, BA; Tiwari, BN; Bajpai, S; Hieronymus, T, First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India., PloS one, vol. 13 no. 11 (January, 2018), pp. e0206314.

  28. Spradley, JP; Pampush, JD; Morse, PE; Kay, RF, Smooth operator: The effects of different 3D mesh retriangulation protocols on the computation of Dirichlet normal energy., American journal of physical anthropology, vol. 163 no. 1 (May, 2017), pp. 94-109.

  29. Vizcaíno, S; De Iullis, G; Brinkman, P; Kay, R; Brinkman, D, ON AN ALBUM OF PHOTOGRAPHS RECORDING FOSSILS IN THE "OLD COLLECTIONS" OF THE MUSEO DE LA PLATA AND AMEGHINO?S PRIVATE COLLECTION AT THE BEGINNING OF THE XXTH CENTURY, Publicación Electrónica de la Asociación Paleontológica Argentina (2017), Asociacion Paleontologica Argentina.

  30. Pampush, JD; Winchester, JM; Morse, PE; Vining, AQ; Boyer, DM; Kay, RF, Introducing molaR: a New R Package for Quantitative Topographic Analysis of Teeth (and Other Topographic Surfaces), Journal of Mammalian Evolution, vol. 23 no. 4 (December, 2016), pp. 397-412, Springer Nature.

  31. Pampush, JD; Spradley, JP; Morse, PE; Harrington, AR; Allen, KL; Boyer, DM; Kay, RF, Wear and its effects on dental topography measures in howling monkeys (Alouatta palliata)., American journal of physical anthropology, vol. 161 no. 4 (December, 2016), pp. 705-721.

  32. Fulwood, EL; Boyer, DM; Kay, RF, Stem members of Platyrrhini are distinct from catarrhines in at least one derived cranial feature., Journal of human evolution, vol. 100 (November, 2016), pp. 16-24.

  33. Cuitiño, JI; Fernicola, JC; Kohn, MJ; Trayler, R; Naipauer, M; Bargo, MS; Kay, RF; Vizcaíno, SF, U-Pb geochronology of the Santa Cruz Formation (early Miocene) at the Río Bote and Río Santa Cruz (southernmost Patagonia, Argentina): Implications for the correlation of fossil vertebrate localities, Journal of South American Earth Sciences, vol. 70 (October, 2016), pp. 198-210, Elsevier BV.

  34. Boyer, DM; Kirk, EC; Silcox, MT; Gunnell, GF; Gilbert, CC; Yapuncich, GS; Allen, KL; Welch, E; Bloch, JI; Gonzales, LA; Kay, RF; Seiffert, ER, Internal carotid arterial canal size and scaling in Euarchonta: Re-assessing implications for arterial patency and phylogenetic relationships in early fossil primates., J Hum Evol, vol. 97 (August, 2016), pp. 123-144.

  35. Spradley, JP; Glander, KE; Kay, RF, Dust in the wind: How climate variables and volcanic dust affect rates of tooth wear in Central American howling monkeys., American journal of physical anthropology, vol. 159 no. 2 (February, 2016), pp. 210-222.

  36. Raigemborn, MS; Matheos, SD; Krapovickas, V; Vizcaíno, SF; Bargo, MS; Kay, RF; Fernicola, JC; Zapata, L, Paleoenvironmental reconstruction of the coastal Monte Léon and Santa Cruz formations (Early Miocene) at Rincón del Buque, Southern Patagonia: A revisited locality, Journal of South American Earth Sciences, vol. 60 (July, 2015), pp. 31-55, Elsevier BV.

  37. Boyer, DM; Winchester, J; Kay, RF, Erratum: The effect of differences in methodology among some recent applications of shearing quotients (American Journal of Physical Anthropology (2015) 156 (166-178)), American Journal of Physical Anthropology, vol. 157 no. 1 (May, 2015), pp. 178, WILEY.

  38. Kay, RF, Anthropology. New World monkey origins., Science (New York, N.Y.), vol. 347 no. 6226 (March, 2015), pp. 1068-1069.

  39. Allen, KL; Cooke, SB; Gonzales, LA; Kay, RF, Dietary inference from upper and lower molar morphology in platyrrhine primates., PloS one, vol. 10 no. 3 (January, 2015), pp. e0118732.

  40. Boyer, DM; Winchester, J; Kay, RF, The effect of differences in methodology among some recent applications of shearing quotients., American journal of physical anthropology, vol. 156 no. 1 (January, 2015), pp. 166-178.

  41. Kay, RF, Biogeography in deep time - What do phylogenetics, geology, and paleoclimate tell us about early platyrrhine evolution?, Mol Phylogenet Evol, vol. 82 Pt B no. PB (January, 2015), pp. 358-374.

  42. Cuitiño JI, Fernicola JC, Kohn M, Naipauer M, Bargo MS, Kay RF, and Vizcaíno SF., U-Pb geochronology of the Santa Cruz Formation at the Santa Cruz and Bote rivers (southernmost Patagonia, Argentina) and its implications for the fossil vertebrate communities., South American Journal of Earth Sciences (2015 in review).

  43. Fulwood E, Boyer D, and Kay RF, Ontogenetic and Evolutionary Aspects of Pterion Contact in Platyrrhines, Journal of Human Evolution (2015 in revision).

  44. R.F. Kay, Science Perspectives: New World Monkey Origins, Science, vol. 347 (2015), pp. 1067-1068.

  45. Perry, JMG; Kay, RF; Vizcaíno, SF; Bargo, MS, Oldest known cranium of a juvenile New World monkey (Early Miocene, Patagonia, Argentina): implications for the taxonomy and the molar eruption pattern of early platyrrhines., Journal of human evolution, vol. 74 (September, 2014), pp. 67-81.

  46. Boyer DM, Winchester JM, Kay RF, The effect of differences in methodology among some recent applications of shearing quotients, American Journal of Physical Anthropology, vol. 156 (July, 2014), pp. 166-178.

  47. Forasiepi, AM; Sánchez-Villagra, MR; Schmelzle, T; Ladevèze, S; Kay, RF, An exceptionally well-preserved skeleton of Palaeothentes from the Early Miocene of Patagonia, Argentina: new insights into the anatomy of extinct paucituberculatan marsupials, Swiss Journal of Palaeontology, vol. 133 no. 1 (July, 2014), pp. 1-21, Springer Nature.

  48. Fernicola, JC; Cuitiño, JI; Vizcaíno, SF; Bargo, MS; Kay, RF, Fossil localities of the Santa Cruz Formation (Early Miocene, Patagonia, Argentina) prospected by Carlos Ameghino in 1887 revisited and the location of the Notohippidian, Journal of South American Earth Sciences, vol. 52 (January, 2014), pp. 94-107, Elsevier BV.

  49. Forasiepi, A. M. Sánchez-Vilagra, M. Schmelzle, T. Kay, R .F., An exceptionally preserved skeleton of Palaeothentes from the Miocene of Patagonia, Argentina: new insights on the anatomy of extinct paucituberculatan marsupials, Swiss Journal of Paleontology, vol. 133 (2014), pp. 1-21.

  50. Patnaik, R; Milankumar Sharma, K; Mohan, L; Williams, BA; Kay, RF; Chatrath, P, Additional Vertebrate Remains from the Early Miocene of Kutch, Gujarat, Special Publication of the Paleontological Society of India, vol. 5 (2014), pp. 335-351.

  51. Fernicola, JC; Cuitiño, JI; Vizcaíno, SF; Bargo, MS; Kay, RF, Fossil Localities Of The Santa Cruz Formation (Lower Miocene, Patagonia, Argentina) Prospected By Carlos Ameghino In 1887. The Problem Of The Notohippidian Stage, South American Journal of Earth Sciences, vol. 52 (2014), pp. 94-107.

  52. Malinzak, MD; Kay, RF; Hullar, TE, Locomotor head movements and semicircular canal morphology in primates., Proc Natl Acad Sci U S A, vol. 109 no. 44 (October, 2012), pp. 17914-17919.

  53. Kay, RF, Evidence for an Asian origin of stem anthropoids., Proceedings of the National Academy of Sciences of the United States of America, vol. 109 no. 26 (June, 2012), pp. 10132-10133.

  54. Wilson, LAB; Madden, RH; Kay, RF; Sánchez-Villagra, MR, Testing a developmental model in the fossil record: Molar proportions in South American ungulates, Paleobiology, vol. 38 no. 2 (March, 2012), pp. 308-321, Cambridge University Press (CUP).

  55. Allen, KL; Kay, RF, Dietary quality and encephalization in platyrrhine primates., Proceedings. Biological sciences, vol. 279 no. 1729 (February, 2012), pp. 715-721.

  56. Malinzak, ; Kay, MD; Hullar, RF; E, T, Predicting locomotion from the primate semicircular canal system, Proceedings of the National Academy (USA), vol. 109 (2012), pp. 17914-17919.

  57. Allen, K; Gonzales, L; Cooke, S; Kay, R, EVALUATION OF UPPER MOLAR OCCLUSAL MORPHOLOGY FOR DIETARY INFERENCE IN MID- TO LARGE-BODIED PLATYRRHINI (PRIMATES), JOURNAL OF VERTEBRATE PALEONTOLOGY, vol. 31 (January, 2011), pp. 61-61, SOC VERTEBRATE PALEONTOLOGY.

  58. Kay, RF; Allen, KL; Gonzales, LA; Krueger, KL; Hunt, KD, Dietary reconstruction of Antillothrix bernensis, a Holocene monkey from the Dominican Republic, Journal of Vertebrate Paleontology, vol. 31 (2011), pp. 135-135, SOC VERTEBRATE PALEONTOLOGY.

  59. Kay, RF; Hunt, KD; Beeker, CD; Conrad, GW; Johnson, CC; Keller, J, Preliminary notes on a newly discovered skull of the extinct Hispaniolian monkey Antillothrix from Hispaniola and the origin of the Greater Antillean monkeys, Journal of Human Evolution, vol. 60 no. 1 (2011), pp. 124-128.

  60. Williams, BA; Kay, RF; Kirk, EC; Ross, CF, Darwinius masillae is a strepsirrhine--a reply to Franzen et al. (2009)., Journal of human evolution, vol. 59 no. 5 (November, 2010), pp. 567-573.

  61. Vizcaíno, SF; Bargo, MS; Kay, RF; Fariña, RA; Di Giacomo, M; Perry, JMG; Prevosti, FJ; Toledo, N; Cassini, GH; Fernicola, JC, A baseline paleoecological study for the Santa Cruz Formation (late-early Miocene) at the Atlantic Coast of Patagonia, Argentina, Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 292 no. 3-4 (January, 2010), pp. 507-519, Elsevier BV.

  62. Perry, JMG; Kay, RF; Vizcaíno, SF; Bargo, MS, Tooth root size, chewing muscle leverage, and the biology of Homunculus patagonicus (Primates) from the late early Miocene of Patagonia, Ameghiniana, vol. 47 no. 3 (January, 2010), pp. 355-371, Asociacion Paleontologica Argentina.

  63. Kay, RF; Fleagle, JG, Stem taxa, homoplasy, long lineages, and the phylogenetic position of Dolichocebus, Journal of Human Evolution, vol. 59 no. 2 (January, 2010), pp. 218-222, Elsevier BV.

  64. Coleman, M; Kay, RF; Colbert, MW, Auditory Morphology and Hearing Sensitivity in Fossil New World Monkeys, Anatomical Record, vol. 293 no. 10 (2010), pp. 1711-1721.

  65. Williams, BA; Kay, RF; Kirk, EC; Ross, C, Darwinius masillae is a European middle Eocene stem strepsirrhine., Journal of Human Evolution, vol. 59 no. 5 (2010), pp. 567-573.

  66. Williams, BA; Kay, RF; Kirk, EC; Ross, C, Darwinius masillae is a European middle Eocene stem strepsirrhine—a reply to Franzen et al., Journal of Human Evolution, vol. 59 (2010), pp. 567-573.

  67. Bargo, MS; Vizcaíno, SF; Kay, RF, Predominance of orthal masticatory movements in the early Miocene Eucholaeops (Mammalia, Xenarthra, Tardigrada, Megalonychidae) and other megatherioid sloths, Journal of Vertebrate Paleontology, vol. 29 no. 3 (December, 2009), pp. 870-880, Informa UK Limited.

  68. Kay, RF, Much Hype and Many Errors The Link Uncovering Our Earliest Ancestor by Colin Tudge, with Josh Young Little, Brown, New York, 2009. 304 pp. $25.99, C$28.99. ISBN 9780316070089., Science, vol. 325 no. 5944 (August, 2009), pp. 1074-1075, American Association for the Advancement of Science (AAAS).

  69. Malinzak, MD; Kay, RF, Systematic characterization of locomotor head movements in Lemur catta, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. Suppl. 48 (January, 2009), pp. 182-182, WILEY-LISS.

  70. Kay, RF, Much hype and many errors, Science, vol. 21 (2009), pp. 1074-1075.

  71. Krueger, KL; Scott, JR; Kay, RF; Ungar, PS, Technical note: Dental microwear textures of "Phase I" and "Phase II" facets., American journal of physical anthropology, vol. 137 no. 4 (December, 2008), pp. 485-490.

  72. Bajpai, S; Kay, RF; Williams, BA; Das, DP; Kapur, VV; Tiwari, BN, The oldest Asian record of Anthropoidea., Proceedings of the National Academy of Sciences of the United States of America, vol. 105 no. 32 (August, 2008), pp. 11093-11098.

  73. Kay, RF; Fleagle, JG; Mitchell, TRT; Colbert, M; Bown, T; Powers, DW, The anatomy of Dolichocebus gaimanensis, a stem platyrrhine monkey from Argentina., Journal of human evolution, vol. 54 no. 3 (March, 2008), pp. 323-382.

  74. Kay, RF; Vizcaíno, SF; Bargo, MS; Perry, JMG; Prevosti, FJ; Fernicola, JC, Two new fossil vertebrate localities in the Santa Cruz Formation (late early - early middle Miocene, Argentina), ∼51° South latitude, Journal of South American Earth Sciences, vol. 25 no. 2 (March, 2008), pp. 187-195, Elsevier BV.

  75. Goin, FJ; Sánchez-Villagra, MR; Abello, A; Kay, RF, A new generalized paucituberculatan marsupial from the oligocene of Bolivia and the origin of 'shrew-like' opossums, Palaeontology, vol. 50 no. 5 (September, 2007), pp. 1267-1276, WILEY.

  76. Goin, F; Abello, A; Bellosi, E; Kay, R; Madden, R; Carlini, A, South American metatherians from the begining of the neogene (Early Miocene, Colhuehuapan Land-mammal Age). Part 1: Introduction, didelphimorphia and sparassodonta, Ameghiniana, vol. 44 no. 1 (March, 2007), pp. 29-71.

  77. Bajpai, S; Thewissen, JGM; Kay, RF; Colbert, M; Kaspur, V, An overview of terrestrial mammals from Cambay shale, Vastan lignite mine, Gujarat (western India), with new taxa and age constraints, Journal of Vertebrate Paleontology, vol. 27, Suppl to Issue 3 no. 3 (2007), pp. 42A-43A.

  78. Coleman, M; Kay, RF, Evaluaing hearing sensitivity in Homunculus patagonicus, American Journal of Physical Anthropology, vol. 98 (2007), pp. 89.

  79. Vizcaíno, SF; Bargo, MS; Kay, RF; Fernicola, JC; Prevosti, F; Toledo, JM; Perry, JGM; Madden, RH; Pomi, LH, Vertebrados de los niveles inferiores de la Formación Santa Cruz (Mioceno inferior-medio, Argentina), Ameghiniana, vol. Resumenes, XXIII Jornadas Argentinas de (2007), pp. 35.

  80. Goin, FJ; Abello, A; Bellosi, E; Kay, RF; Madden, RH; Carlini, AA, Los Metatheria sudamericanos de comienzos del Neógeno (Mioceno temprano, Edad-mamífero Colhuehuapense). Parte 1: Introducción, Didelphimorphia y Sparassodonta, Ameghiniana, vol. 44 no. 1 (2007), pp. 29-71.

  81. Forasiepi, AM; Sánchez-Villagra, MR; Goin, FJ; Takai, M; Shigehara, N; Kay, RF, A new species of Hathliacynidae (Metatheria, Sparassodonta) from the middle Miocene of Quebrada Honda, Bolivia, Journal of Vertebrate Paleontology, vol. 26 no. 3 (September, 2006), pp. 670-684, Informa UK Limited.

  82. Vizcaíno, SF; Bargo, MS; Kay, RF; Milne, N, The armadillos (Mammalia, Xenarthra, Dasypodidae) of the Santa Cruz Formation (early-middle Miocene): An approach to their paleobiology, Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 237 no. 2-4 (August, 2006), pp. 255-269, Elsevier BV.

  83. Kay, RF; Cozzuol, MA, New platyrrhine monkeys from the Solimões Formation (late Miocene, Acre State, Brazil)., Journal of human evolution, vol. 50 no. 6 (June, 2006), pp. 673-686.

  84. Tafforeau, P; Boistel, R; Boller, E; Bravin, A; Brunet, M; Chaimanee, Y; Cloetens, P; Feist, M; Hoszowska, J; Jaeger, JJ; Kay, RF; Lazzari, V; Marivaux, L; Nel, A; Nemoz, C; Thibault, X; Vignaud, P; Zabler, S, Applications of X-ray synchrotron microtomography for non-destructive 3D studies of paleontological specimens, Applied Physics A: Materials Science and Processing, vol. 83 no. 2 (May, 2006), pp. 195-202, Springer Nature.

  85. Fleagle, JG; Kay, RF, A new humerus of Homunculus from the Santa Cruz Formation, (early-middle Miocene, Patagonia)., Journal of Vertebrate Paleontology, vol. 26 (2006), pp. 62A.

  86. Kay, RF; Cozzuol, M, A new platyrrhine from the Solimões Formation (late Miocene, Acre State, Brazil) with comments about other Miocene monkeys from that region., Journal of Human Evolution, vol. 50 no. 6 (2006), pp. 673-686.

  87. Vizcaino, ; F, S; Bargo, ; S, M; Kay, ; F, R; Milne, , The armadillos (Mammalia, Xenarthra, Dasypodidae) of the Santa Cruz formation (early-middle Miocene), Palaeogeography, Palaeoclimatology and Paleoecology, vol. 237 (2006), pp. 255-269.

  88. Kay, RF, A synopsis of the phylogeny and paleobiology of Amphipithecidae, South Asian middle and late Eocene primates, Anthropological Science, vol. 113 no. 1 (April, 2005), pp. 33-42, Anthropological Society of Nippon.

  89. Kay, RF; Vizcaino, S; Tauber, AA; Bargo, MS; Williams, BA; Luna, C; Colbert, MW, Three newly discovered skulls of Homunculus patagonicus support its position as a stem platyrrhine and establish its diurnal arboreal folivorous habits., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 40 (January, 2005), pp. 127-127, WILEY-LISS.

  90. Kay, RF; Campbell, VM; Rossie, JB; Colbert, MW; Rowe, TB, Olfactory fossa of Tremacebus harringtoni (platyrrhini, early Miocene, Sacanana, Argentina): implications for activity pattern., The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology, vol. 281 no. 1 (November, 2004), pp. 1157-1172.

  91. Kohn, MJ; Josef, JA; Madden, R; Kay, R; Vucetich, G; Carlini, AA, Climate stability across the Eocene-Oligocene transition, southern Argentina, Geology, vol. 32 no. 7 (July, 2004), pp. 621-624, Geological Society of America.

  92. Kay, RF; Schmitt, D; Vinyard, CJ; Perry, JMG; Shigehara, N; Takai, M; Egi, N, The paleobiology of Amphipithecidae, South Asian late Eocene primates., Journal of human evolution, vol. 46 no. 1 (January, 2004), pp. 3-25.

  93. Bellosi, ES; Madden, R; Kay, RF, Discontinuidades estratigráficas de la Formación Sarmiento en Gran Barranca (Patagonia central): evaluación preliminary de la integridad de su registro, Resumenes de Comunicaciones de la Asociación Argentina de Paleontologia (Diamante, Argentina), vol. 2004 (2004), pp. 6-7.

  94. Madden, R; Kay, RF; Heizler, M; Vilas, F; Re, G, Geochronology of the Sarmiento Formation at Gran Barranca and Elsewhere in Patagonia: Calibrating Middle Cenozoic Mammal Evolution in South America, Journal of Vertebrate Paleontology, vol. 24 (2004), pp. 87A.

  95. Tauber, AA; Kay, RF; Luna, C, Killik Aike Norte, una localidad clásica de la Formación Santa Cruz (Mioceno temprano-medio), Patagonia, Argentina, Ameghiniana, vol. Resúmenes, 2004 (2004), pp. 26.

  96. Tauber, AA; Kay, RF; Luna, C; Palacoos, ME, Aspectos paleoambientales de la Formacion Santa Cruz (Mioeno temprano-medio) en Killik Aike Norte, Patagonia, Argentina, Asociacion Paleontologica Argentina, Reunin Anual de Communicaciones (2004), pp. 26.

  97. Tauber, AA; Vizcaino, SF; Kay, RF; Bargo, MS; Luna, C, Aspectos biostratigráficos y paleoecológicos de la Formación Santa Cruz (Mioceno temprano-medio) de Patagonia, Argentina, Ameghiniana (2004), Ameghiniana.

  98. Vizcaino, SF; Bargo, MS; Tauber, AA; Kay, RF, The armadillos (Mammalia, Xenarthra) of the Santa Cruz Formation (Early-Middle Miocene). An approach to their paleobiology., Ameghiniana (2004), Ameghiniana.

  99. Forasiepi, ; Sánchez-Villagra, A; Goin, MR; Madden, FJ; R, ; Takai, M; Kay, M; F, R, A new hathliacynidae (Metatheria, Sparassodonta) from the middle Miocene of Quebrada Honda, Bolivia, Journal of Vertebrate Paleontology (2004).

  100. Ungar, PS; Teaford, MF; Kay, RF, Molar micowear and shearing crest development in Miocene catarrhines, Anthropologie, vol. 42 (2004), pp. 21-35.

  101. Kay, RF, A synopsis of the phylogeny and paleobiology of Amphipithecidae, South Asian middle and late Eocene primates, Anthropological Science (Japan), vol. 113 no. 1 (2004), pp. 1-12.

  102. Kay, RF, The primate fossil record, American Journal of Human Biology, vol. 15 no. 6 (November, 2003), pp. 839-840, Wiley.

  103. Jungers, WL; Pokempner, AA; Kay, RF; Cartmill, M, Hypoglossal canal size in living hominoids and the evolution of human speech., Human biology, vol. 75 no. 4 (August, 2003), pp. 473-484.

  104. Goin, FJ; Sanchez-Villagra, MR; Kay, RF; Anaya-Daza, F; Takai, M, New Palaeothentid marsupial from the middle Miocene of Bolivia, Palaeontology, vol. 46 no. 2 (January, 2003), pp. 307-315, WILEY.

  105. Kay, RF; Mitchell, TRT, Cranial evidence for the timing of the catarrhine-platyrrhine divergence., Suppl. 35, American Journal of Physical Anthropology, vol. Suppl. 35 (2003), pp. 137.

  106. Kirk, EC; Cartmill, M; Kay, RF; Lemelin, P, Primate origins and carpolestid relationships: not nailed yet. Comment on Block and Boyer, Science, vol. 300 (2003), pp. 471.

  107. Bellosi, ES; Miquel, SE; Kay, RF; Madden, RH, A Mustersan Paleosol bearing land microgastropods (Charopidae) from the Sarmiento Formation, Eocene of Central Patagonia: Climatic implications, Ameghiniana, vol. 39 no. 4 (December, 2002), pp. 465-477.

  108. Holroyd, PA; Ciochon, RL; Gunnell, GF; Kay, RF; Takai, M; Godinot, M, What's in a name? Family-group taxonomy of larger-bodied Southeast Asian Eocene primates., Journal of human evolution, vol. 43 no. 5 (November, 2002), pp. 755-758.

  109. Shigehara, N; Takai, M; Kay, RF; Aung, AK; Soe, AN; Tun, ST; Tsubamato, T; Thein, T, The upper dentition and face of Pondaungia cotteri from central Myanmar., Journal of human evolution, vol. 43 no. 2 (August, 2002), pp. 143-166.

  110. Kirk, EC; Kay, RF; Jungers, WL, Activity patterns of subfossil lemurs: evidence based on the relative size of the optic canal., Supplement 34, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 96 (January, 2002), pp. 96-96, WILEY-LISS.

  111. Kay, RF; Schmitt, D; Vinyard, C, Pondaungia cotteri, a slow moving primate seed predator from the Eocene of South Asia, Supplement 34, American Journal of Physical Anthropology, vol. Supplement 34 (2002), pp. 92-93.

  112. Bellosi, ES; Miquel, SE; Kay, RF; Madden, RH, A Mustersan Paleosol bearing land microgastropods (Charopidae) from the Sarmiento Formation, Eocene of Central Patagonia: Climatic implications, Ameghiniana, vol. 39 no. 4 (2002), pp. 465-477.

  113. Bellosi, ES; Miquel, SE; Kay, RF; Madden, RH, Un paleosuelo Mustersense con microgastrópodos terrestres (Charopidae) de la Formación Sarmiento, Eoceno de Patagonia central: significado paleoclimático, Ameghiniana, vol. 39 (2002), pp. 453-464.

  114. Williams, SH; Kay, RF, A comparative test of adaptive explanations for hypsodonty in ungulates and rodents, Journal of Mammalian Evolution, vol. 8 no. 3 (January, 2001), pp. 207-229.

  115. Kay, RF; Madden, RH; Bellosi, ES; Carlini, AA; Heizler, M; Ré, G; Vilas, F; Vucetich, MG, Puesto Almendra-Colhue-Huapi contact at Gan Barranca, Sarmiento Formation, Chubut, Argentina, supplement, Ameghiniana, vol. 38 no. 4 (2001), pp. 35R.

  116. Kay, RF; Madden, RH; Carlini, AA; Bellosi, ES; Heizler, M; Ré, G; Vilas, F; Vucetich, MG, The Mustersan interval at Gran Barranca, supplement, Ameghiniana, vol. 38 no. 4 (2001), pp. 34R.

  117. Kay, RF; Kirk, EC, Osteological evidence for the evolution of activity pattern and visual acuity in primates., American journal of physical anthropology, vol. 113 no. 2 (October, 2000), pp. 235-262.

  118. Sanchez-Villagra, MR; Burnham, RJ; Campbell, DC; Feldmann, RM; Gaffney, ES; Kay, RF; Lozsan, R; Purdy, R; Thewissen, JGM, A new near-shore marine fauna and flora from the early neogene of northwestern Venezuela, Journal of Paleontology, vol. 74 no. 5 (January, 2000), pp. 957-968, Cambridge University Press (CUP).

  119. Sänchez-Villagra, MR; Kay, RF; Anaya-Daza, F, Cranial anatomy and palaeobiology of the Miocene marsupial Hondalagus altiplanensis and a phylogeny of Argyrolagids, Palaeontology, vol. 43 no. 2 (January, 2000), pp. 287-301, WILEY.

  120. Kay, RF, Review of Adaptive Radiations of Neotropical Primates, edited by M. A. Norconk, A. L. Rosenberger, and P. A. Garber, International Journal of Primatology, vol. 21 (2000), pp. 325-327.

  121. Kay, RF; Kirk, EC, Ostological evidence for the evolution of activity pattern and visual acuity in primates, American Journal of Physical Anthropology, vol. 113 (2000), pp. 235-262.

  122. Kay, RF; Madden, RH; Vucetich, MG; Carlini, AA; Mazzoni, MM; Re, GH; Heizler, M; Sandeman, H, Revised geochronology of the Casamayoran South American Land Mammal Age: climatic and biotic implications., Proceedings of the National Academy of Sciences of the United States of America, vol. 96 no. 23 (November, 1999), pp. 13235-13240.

  123. Kay, RF; Madden, RH; Mazzoni, M; Vucetich, MG; Re, G; Heizler, M; Sandeman, H, The oldest Argentine primates: first age determinations for the Colhuehuapian South American Land Mammal 'Age'., Supplement 28, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (January, 1999), pp. 166-166, WILEY-LISS.

  124. Carlini, AA; Vucetich, MG; Mazzoni, M; Zucol, A; Ré, GH; Vilas, JFA; Kay, RF; Madden, RH; Heizler, M, Implications of the late Eocene age of the casamayoran fauna at Gran Barranca, Patagonia., Journal of Vertebrate Paleontology, vol. 19, Suppl to #3 (1999), pp. 35A.

  125. Kay, RF; Johnson, DJ; Meldrum, DJ, Proteropithecia, new name for Propithecia Kay, Johnson and Meldrum, 1998 non Vojnits 1985, American Journal of Primatology, vol. 47 (1999), pp. 347.

  126. Williams, SH; Kay, RF, A comparative test of competing adaptive explanations for hypsodonty in ungulates and rodents, Programa y Resúmenes, Evolución Neotropical del Cenozoico,La Paz, Bolivia, Programa y Resúmenes, Evolución Neotropical del Cenozoico,La Paz, Bolivia (1999), pp. 46.

  127. Zack, S; Kay, RF; Madden, RH, New notoungulates from the Paleogene at Vilcapujio, Bolivia, Journal of Vertebrate Paleontology, vol. 19, Suppl to #3 (1999), pp. 86A.

  128. Kay, RFD; Johnson, D; Meldrum, DJ, Erratum: A new pitheciin primate from the middle Miocene of Argentina (American Journal of Primatology (1998) 45 (317-336)), American Journal of Primatology, vol. 47 no. 4 (1999), pp. 347-, WILEY.

  129. Kay, RF; Johnson, DJ; Meldrum, DJ, Proteropithecia, new name for Propithecia, American Juurnal of Primatology, vol. 47 (1999), pp. 347 (1998 non Vojnits 1985.).

  130. Ross, C; Williams, B; Kay, RF, Phylogenetic analysis of anthropoid relationships., Journal of human evolution, vol. 35 no. 3 (September, 1998), pp. 221-306.

  131. Kay, RF; Cartmill, M; Balow, M, The hypoglossal canal and the origin of human vocal behavior., Proceedings of the National Academy of Sciences of the United States of America, vol. 95 no. 9 (April, 1998), pp. 5417-5419.

  132. Kay, RF; Macfadden, BJ; Madden, RH; Sandeman, H; Anaya, F, Revised age of the salla beds, Bolivia, and its bearing on the age of the deseadan South American land mammal “age”, Journal of Vertebrate Paleontology, vol. 18 no. 1 (January, 1998), pp. 189-199, Informa UK Limited.

  133. Kay, RF; Johnson, D; Meldrum, DJ, A new pitheciin primate from the middle Miocene of Argentina., American journal of primatology, vol. 45 no. 4 (January, 1998), pp. 317-336.

  134. Gonzalez, WG; Kay, RF; Kirk, EC, Optic canal and orbit size-- implications for the origins of diurnality and visual acuity in primates, American Journal of Physical Anthropology, vol. Suppl 26 (1998), pp. 87.

  135. Kay, RF; Cartmill, M; Balow, M, The hypoglossal canal and the origins of human vocal behavior, American Journal of Physical Anthropology, vol. Suppl. 26 (1998), pp. 137.

  136. Kay, RF; Ross, C; Williams, BA; Johnson, D, Cladistic analysis and anthropoid origins - Response, SCIENCE, vol. 278 no. 5346 (December, 1997), pp. 2135-2136, AMER ASSOC ADVANCEMENT SCIENCE.

  137. Kay, RF; Madden, RH; Van Schaik, C; Higdon, D, Primate species richness is determined by plant productivity: implications for conservation., Proceedings of the National Academy of Sciences of the United States of America, vol. 94 no. 24 (November, 1997), pp. 13023-13027.

  138. Meldrum, DJ; Kay, RF, Nuciruptor rubricae, a new pitheciin seed predator from the Miocene of Colombia., American journal of physical anthropology, vol. 102 no. 3 (March, 1997), pp. 407-427.

  139. Kay, RF; Ross, C; Williams, BA, Anthropoid origins., Science (New York, N.Y.), vol. 275 no. 5301 (February, 1997), pp. 797-804.

  140. Kay, RF; Madden, RH, Mammals and rainfall: paleoecology of the middle Miocene at La Venta (Colombia, South America)., Journal of human evolution, vol. 32 no. 2-3 (February, 1997), pp. 161-199.

  141. Sánchez-Villagra, MR; Kay, RF, A skull of proargyrolagus, the oldest argyrolagid (late oligocene salla beds, bolivia), with brief comments concerning its paleobiology, Journal of Vertebrate Paleontology, vol. 17 no. 4 (January, 1997), pp. 717-724, Informa UK Limited.

  142. Allmendinger, RW; Jordan, TE; Kay, SM; Isacks, BL, The evolution of the Altiplano-Puna Plateau of the central Andes, Annual Review of Earth and Planetary Sciences, vol. 25 (1997), pp. 139-174.

  143. Melrum, DJ; Kay, RF, Erratum: Nuciruptor rubicae, a new pitheciin seed predator from the miocene of Colombia (American Journal of Physical Anthropology (1997) 102 (407-427)), American Journal of Physical Anthropology, vol. 104 no. 1 (1997), pp. 153-, WILEY.

  144. Kay, RF; Ross, C; Williams, BA; Johnson, D, Cladistic analysis and Anthropoid Origins, reply to Block et al., Science, vol. 278 no. 5346 (1997), pp. 2135-2136.

  145. Kay, RF, Colobine monkeys. Their ecology, behavior and evolution - Davies,AG, Gates,JF, SCIENCE, vol. 271 no. 5246 (January, 1996), pp. 156-157, AMER ASSOC ADVANCEMENT SCIENCE.

  146. Sánchez-Vittagra, MR; Kay, RF, Do phalangeriforms (Marsupialia: Diprotodontia) have a 'hypocone'?, Australian Journal of Zoology, vol. 44 no. 5 (January, 1996), pp. 461-467, CSIRO PUBLISHING.

  147. Carlini, A.A., R.H. Madden, G. López, R.F. Kay, M.G. Vucetich, M. Bond, T. Jordan, , Nuevos mamíferos de la Formación Chinches (Mioceno) de la Cordillera Frontal de San Juan, Argentina, XIII Jornadas Argeninas de Paleontologia de Vertebrados, Resumenes, Resúmenes, XII Jornadas Argentinas de Paleontología de Vertebrados (La Pampa, May 1996) (1996).

  148. Teaford, MF; Ungar, PS; Kay, RF; Leakey, MG, The evolution of diet in Old World monkeys, American Journal of Physical Anthropology, vol. Suppl. 22 (1996), pp. 227.

  149. Kay, RF, Review of Colobine Monkeys. Their ecology, behavior and evolution by A.G. Davies and J.F. Oates, Science, vol. 271 (1996), pp. 156-157.

  150. Ungar, PS; Kay, RF, The dietary adaptations of European Miocene catarrhines., Proceedings of the National Academy of Sciences of the United States of America, vol. 92 no. 12 (June, 1995), pp. 5479-5481.

  151. Sanchez-Villagra, MR; Kay, RF, A SKULL OF PROARGYROLAGUS. THE OLDEST ARGYROLAGID (EARLY MIOCENE SALLA BEDS, BOLIVIA), JOURNAL OF VERTEBRATE PALEONTOLOGY, vol. 15 (January, 1995), pp. 51A-52A, TAYLOR & FRANCIS INC.

  152. Kay, RF; MacFadden, BJ; Madden, RH; Anaya, F; Farrar, E, NEW RADIOMETRIC DATES CONFIRM LATE OLIGOCENE AGE OF DESEADAN SALLA BEDS, BOLIVIA AND THE OLDEST KNOWN SOUTH AMERICAN PRIMATE, JOURNAL OF VERTEBRATE PALEONTOLOGY, vol. 15 (January, 1995), pp. 38A-38A, TAYLOR & FRANCIS INC.

  153. Ungar, PS; Kay, RF, Molar Shear and dietary adaptations of European Miocene catarrhines, American Journal of Physical Anthropology, vol. Suppl. 20 (1995), pp. 214.

  154. Kay, RF, "Giant" tamarin from the Miocene of Colombia., American journal of physical anthropology, vol. 95 no. 3 (November, 1994), pp. 333-353.

  155. Williams, BA; Kay, RF, The taxon anthropoidea and the crown clade concept, Evolutionary Anthropology: Issues, News, and Reviews, vol. 3 no. 6 (January, 1994), pp. 188-190, WILEY.

  156. Kay, RF; Madden, RH, An overview of the paleogeography and paleoecology of the La Venta region, American Journal of Physical Anthropology, vol. Suppl. 18 (1994), pp. 120.

  157. Kay, RF; Williams, BA, Cladistics, computers, and character analysis., Evolutionary Anthropology, vol. 3 (1994), pp. 32-35.

  158. Kay, RF, "Giant" Tamarin from the Miocene of Colombia, American Journal of Physcial Anthropology, vol. 13 no. 3 (1994), pp. 34-48.

  159. Kay, RF; Frailey, CD, Fossil platyrrhines from the Rio Acre local fauna, late Miocene, western Amazonia, Journal of Human Evolution, vol. 25 no. 4 (December, 1993), pp. 319-327.

  160. Anthony, MRL; Kay, RF, Tooth form and diet in ateline and alouattine primates: reflections on the comparative method, American Journal of Science, vol. 293 A no. A (January, 1993), pp. 356-382, American Journal of Science (AJS).

  161. Kay, RF; Frailey, CD, Large fossil platyrrhines from the Rio Acre local fauna, late Miocene, western Amazonia, Journal of Human Evolution, vol. 25 no. 4 (January, 1993), pp. 319-327, Elsevier BV.

  162. Anthony, M.R.L. and R.F. Kay, Tooth form and diet in ateline and alouattine primates: reflections on the comparative method, American Journal of Physical Anthropology, vol. 283A (1993), pp. 356-382.

  163. Kay, RF; Madden, RH; Vucetich, MG; Cifelli, RL; Mazzoni, MM; III, CCS, Vertebrate paleontology in the Eocene of Bolivia and the Deseadan of Argentina, Journal of Vertebrate Paleontology, vol. 13 no. 3 (1993), pp. 44A.

  164. Kay, RF; Thewissen, JGM; Yoder, AD, Cranial anatomy of Ignacius graybullianus and the affinities of the Plesiadapiformes, American Journal of Physical Anthropology, vol. 89 no. 4 (January, 1992), pp. 477-498, WILEY.

  165. Meldrum, DJ; Kay, RF, A new specimen of pitheciine primate from the Miocene of Colombia, American Journal of Physical Anthropology, vol. Supplement 14 (1992), pp. 121.

  166. Kay, RF, Primate phylogeny. Edited by F.E. Grine, J.G. Fleagle, and L.B. Martin. London: Academic Press. 1987. iii + 146 pp., tables, figures, $7.95 (paper), American Journal of Physical Anthropology, vol. 84 no. 1 (January, 1991), pp. 109-111, Wiley.

  167. Kay, RF, Review of Primate Phylogeny by F.E. Grine, J.G. Fleagle and L.B. Martin, American Journal of Physical Anthropology, vol. 84 (1991), pp. 109-111.

  168. Madden, RH; Kay, RF, The Friasian of Patagonia, Journal of Vertebrate Paleontology, vol. 11 no. 3 (1991), pp. 44A.

  169. Kay, RF; Anthony, MRL, Tooth form and diet in ateline and alouattine primates: reflections on the comparative method, Journal of Vertebrate Paleontology, vol. 11 (1991), pp. 39A.

  170. Meldrum, DJ; Fleagle, JG; Kay, RF, Partial humeri of two Miocene Colombian primates., American journal of physical anthropology, vol. 81 no. 3 (March, 1990), pp. 413-422.

  171. MELDRUM, DJ; KAY, RF, A NEW PARTIAL SKELETON OF CEBUPITHECIA-SARMIENTOI FROM THE MIOCENE OF COLOMBIA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 81 no. 2 (February, 1990), pp. 267-267, WILEY-LISS.

  172. Kay, RF, The phyletic relationships of extant and fossil Pitheciinae (Platyrrhini, Anthropoidea), Journal of Human Evolution, vol. 19 no. 1-2 (January, 1990), pp. 175-208, Elsevier BV.

  173. Kay, RF; Thorington, RW; Houde, P, Eocene plesiadapiform shows affinities with flying lemurs not primates, Nature, vol. 345 no. 6273 (January, 1990), pp. 342-344, Springer Nature.

  174. Kay, ; F, R; Madden, RH; D, JG, Nuevos hallazgos de monos del Mioceno de Colombia, Ameghiniana, vol. 25 (1990), pp. 203-213.

  175. FLEAGLE, JG; KAY, RF, THE DENTAL MORPHOLOGY OF DOLICHOCEBUS-GAIMANENSIS, A FOSSIL MONKEY FROM ARGENTINA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 78 no. 2 (February, 1989), pp. 221-221, WILEY-LISS.

  176. KAY, RF, A NEW SMALL PLATYRRHINE FROM THE MIOCENE OF COLOMBIA AND THE PHYLETIC POSITION OF THE CALLITRICHINES, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 78 no. 2 (February, 1989), pp. 251-251, WILEY-LISS.

  177. MADDEN, RH; KAY, RF; GUERRERO, J, NEW STIRTONIA-VICTORIAE MATERIAL FROM THE MIOCENE OF COLOMBIA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 78 no. 2 (February, 1989), pp. 265-265, WILEY-LISS.

  178. Kay, RF, A new small platyrrhine from the Miocene of Colombia and the phyletic position of the callitrichines, American Journal of Physical Anthropology, vol. 78 (1989), pp. 151.

  179. Kay, RF, Review of Primate Adaptation and Evolution by J.G. Fleagle, Quarterly Review of Biology, vol. 64 (1989), pp. 344.

  180. Kay, RF, A new "giant" tamarin from the Miocene of Colombia, Journal of Vertebrate Paleontology, vol. 9 no. 3 (1989), pp. 28A.

  181. Madden, RH; Kay, RF; Lundberg, JF; Scillato-Yane, G, Vertebrate paleontology, stratigraphy, and biochronology of the Miocene of southern Ecuador, Journal of Vertebrate Paleontology, vol. 9 no. 3 (1989), pp. 31A.

  182. Kay, RF; Plavcan, JM; Glander, KE; Wright, PC, Sexual selection and canine dimorphism in New World monkeys., American journal of physical anthropology, vol. 77 no. 3 (November, 1988), pp. 385-397.

  183. Plavcan, JM; Kay, RF, Sexual dimorphism and dental variability in platyrrhine primates, International Journal of Primatology, vol. 9 no. 3 (June, 1988), pp. 169-178, Springer Nature.

  184. Grine, FE; Kay, RF, Early hominid diets from quantitative image analysis of dental microwear., Nature, vol. 333 no. 6175 (June, 1988), pp. 765-768.

  185. KAY, RF; FLEAGLE, JG, THE PHYLOGENETIC POSITION OF PARAPITHECIDAE (PRIMATES, ANTHROPOIDEA), AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 75 no. 2 (February, 1988), pp. 230-230, WILEY-LISS.

  186. Simons, EL; Kay, RF, New material of Qatrania from Egypt with comments on the phylogenetic position of the parapithecidae (primates, Anthropoidea)., American journal of primatology, vol. 15 no. 4 (January, 1988), pp. 337-347, WILEY.

  187. Kay, RF; Cant, JGH, Age assessment using cementum annulus counts and tooth wear in a free-ranging population of Macaca mulatta., American journal of primatology, vol. 15 no. 1 (January, 1988), pp. 1-15, WILEY.

  188. Kay, RF, Phyletic Position of the Pitheciinae, Journal of Vertebrate Paleontology, vol. 8 (Suppl. 3) (1988), pp. 19a.

  189. Madden, RH; Kay, RF; Lundberg, JG; Cifelli, RL; Guerrero, J, Informe general de nuevos descubrimientos en el Mioceno de Colombia y Chile, V. Journadas Arg. Paleont. Vert. (1988).

  190. Kay, RF, Analysis of primate dental microwear using image processing techniques., Scanning microscopy, vol. 1 no. 2 (June, 1987), pp. 657-662.

  191. PLAVCAN, JM; KAY, RF; ALBRECHT, GH, SEXUAL DIMORPHISM AND DENTAL VARIABILITY AMONG EXTANT PLATYRRHINES, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 72 no. 2 (February, 1987), pp. 243-243, WILEY-LISS.

  192. KAY, RF; PLAVCAN, JM; WRIGHT, PC; GLANDER, KE; ALBRECHT, GH, BEHAVIORAL AND SIZE CORRELATES OF CANINE DIMORPHISM IN PLATYRRHINE PRIMATES, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 72 no. 2 (February, 1987), pp. 218-218, WILEY-LISS.

  193. Kay, RF; Madden, RH; Plavcan, JM; Cifelli, RL; Díaz, JG, Stirtonia victoriae, a new species of Miocene Colombian primate, Journal of Human Evolution, vol. 16 no. 2 (January, 1987), pp. 173-196, Elsevier BV.

  194. Fleagle, JG; Kay, RF, The phyletic position of the Parapithecidae, Journal of Human Evolution, vol. 16 no. 6 (January, 1987), pp. 483-532, Elsevier BV.

  195. Kay, RF, Major Topics in Primate and Human Evolution, edited by B. Wood, L. Martin and P. Andrews, review, American Scientist, vol. 75 (1987), pp. 312.

  196. Kay, RF, Review of Sexual Dimorphism in Living and Fossil Primates, edited by M. Pickford and B. Chiarelli, International Journal of Primatology, vol. 8 (1987), pp. 93-95.

  197. Kay, RF, Primate Evolution, edited by J.G. Else and P.C. Lee, Quarterly Review of Biology, vol. 62 (1987), pp. 451.

  198. KAY, RF; MADDEN, RM; CIFELLI, RL; DIAZ, JG, A NEW SPECIMEN OF MIOCENE COLOMBIAN STIRTONIA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 69 no. 2 (February, 1986), pp. 221-221, WILEY-BLACKWELL.

  199. Luchterhand, K; Kay, RF; Madden, RH, ( Mohanamico herskovitzi gen. et sp. nov., a middle Miocene South American primate)., Comptes Rendus - Academie des Sciences, Series II, vol. 303 no. 19 (January, 1986), pp. 1753-1758.

  200. Lundberg, JG; Machado-Allison, A; Kay, RF, Miocene characid fishes from Colombia: Evolutionary stasis and extirpation, Science, vol. 234 no. 4773 (January, 1986), pp. 205-208.

  201. Kay, CN; Scapino, RP; Kay, ED, A cinephotographic study of the role of the canine in limiting lateral jaw movements in Macaca fascicularis, Journal of Dental Research, vol. 65 (1986), pp. 1300-1302.

  202. Luchterhand, K; Kay, RF; Madden, RH, Mohanamico hershkovitzi, gen. et sp. nov., un primate du Miocène moyen d'Amérique du Sud, Comptes Rendus, Adademie des Sciences (Paris), vol. 303 no. II (1986), pp. 1753-1758.

  203. KAY, RF; CANT, JGH, CEMENTUM ANNULUS COUNTS AND CHRONOLOGICAL AGE IN MACACA-MULATTA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 66 no. 2 (January, 1985), pp. 188-188, WILEY-LISS.

  204. Kay, RF, Dental evidence for the diet of Australopithecus., Annual review of anthropology. Vol. 14, vol. 14 no. 1 (January, 1985), pp. 315-341, ANNUAL REVIEWS.

  205. Kay, RF, Review of A Complete Guide to the Monkeys, Apes and Other Primates by M. Kavanagh, Quarterly Review of Biology, vol. 60 (1985), pp. 231.

  206. ALBRECHT, GH; KAY, RF, PORTABLE MICROCOMPUTERS, ELECTRONIC DIGITAL CALIPERS, AND THE COLLECTION OF MORPHOMETRIC DATA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 63 no. 2 (January, 1984), pp. 133-134, WILEY-LISS.

  207. Kay, RF; Rasmussen, DT; Beard, KC, Cementum annulus counts provide a means for age determination in Macaca mulatta (primates, anthropoidea)., Folia primatologica; international journal of primatology, vol. 42 no. 2 (January, 1984), pp. 85-95.

  208. Kay, RF, The Order of Man by Charles Oxnard, review, Quarterly Review of Biology, vol. 59 (1984), pp. 480-481.

  209. Kay, RF; Rasmussen, DT; Beard, KC, Cementum annulus counts provide a mean for age determination in Macaca mulatta, Folia Primatologica, vol. 42 no. 2 (1984), pp. 85-95.

  210. Simons, EL; Kay, RF, Qatrania, new basal anthropoid primate from the Fayum, Oligocene of Egypt, Nature, vol. 304 no. 5927 (December, 1983), pp. 624-626, Springer Nature.

  211. Kay, RF; Simons, EL, Dental formulae and dental eruption patterns in Parapithecidae (Primates, Anthropoidea)., American journal of physical anthropology, vol. 62 no. 4 (December, 1983), pp. 363-375.

  212. Kay, RF; Covert, HH, True grit: a microwear experiment., American journal of physical anthropology, vol. 61 no. 1 (May, 1983), pp. 33-38.

  213. Kay, RF, RAMAPITHECUS RECLAIMED, The Sciences, vol. 23 no. 1 (January, 1983), pp. 26-27, Wiley.

  214. Kay, RF, Sivapithecus simonsi, a new species of miocene hominoid, with comments on the phylogenetic status of the ramapithecinae, International Journal of Primatology, vol. 3 no. 2 (June, 1982), pp. 113-173, Springer Nature.

  215. Sheine, WS; Kay, RF, A model for comparison of masticatory effectiveness in primates., Journal of morphology, vol. 172 no. 2 (May, 1982), pp. 139-149.

  216. Kay, RF, Sexual dimorphism in Ramapithecinae., Procedings of the National Academy (USA), Proceedings of the National Academy of Sciences of the United States of America, vol. 79 no. 2 (January, 1982), pp. 209-212.

  217. Kay, RF, Advances in San Juan Basin Paleontology by Lucas, et al., an review, American Scientist, vol. 70 (1982), pp. 318.

  218. Kay, RF; Cartmill, M; MacPhee, RDE, Habitus and heritage in archaic primates (Plesiadapiformes), International Journal of Primatology, vol. 3 (1982), pp. 302.

  219. Fleagle, JG; Kay, RF; Simons, EL, Sexual dimorphism in early anthropoids: response to Leutenegger, Naure, vol. 290 (December, 1981), pp. 609.

  220. Covert, HH; Kay, RF, Dental microwear and diet: implications for determining the feeding behaviors of extinct primates, with a comment on the dietary pattern of Sivapithecus., American journal of physical anthropology, vol. 55 no. 3 (July, 1981), pp. 331-336.

  221. Kay, RF, The ontogeny of premolar dental wear in Cercocebus albigena (cercopithecidae), American Journal of Physical Anthropology, vol. 54 no. 1 (January, 1981), pp. 153-155, WILEY.

  222. Kay, RF, The nut‐crackers – a new theory of the adaptations of the Ramapithecinae, American Journal of Physical Anthropology, vol. 55 no. 2 (January, 1981), pp. 141-151, WILEY.

  223. Kay, RF; Fleagle, JG; Simons, EL, A revision of the Oligocene apes of the Fayum Province, Egypt, American Journal of Physical Anthropology, vol. 55 no. 3 (January, 1981), pp. 293-322, WILEY.

  224. Fleagle, JG; Kay, RF; Simons, EL, Sexual dimorphism in early anthropoids., Nature, vol. 287 no. 5780 (September, 1980), pp. 328-330, Springer Nature.

  225. COVERT, HH; KAY, RF, DENTAL MICROWEAR AND DIET - IMPLICATIONS FOR EARLY HOMINID FEEDING-BEHAVIOR, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 52 no. 2 (January, 1980), pp. 216-216, WILEY-LISS.

  226. Kay, RF; Simons, EL, Comments on the adaptive strategy of the first African anthropoids., Zeitschrift fur Morphologie und Anthropologie, vol. 71 no. 2 (January, 1980), pp. 143-148.

  227. SIMONS, EL; KAY, RF, DAWN APE PROVIDES CLUE TO SOCIAL-LIFE, GEOTIMES, vol. 25 no. 5 (January, 1980), pp. 18-18, AMER GEOLOGICAL INST.

  228. Kay, R.F. and E.L. Simons, Comments on the adaptive strategy of the first African Anthropoidea, Zeitschrift fur Morphologie und Anthropologie, vol. 71 (1980), pp. 143-148.

  229. Kay, RF, Documenting our antecedents--A review of F. Szalay and E. Delson's book: Evolutionary History of the Primates, Paleobiology, vol. 6 (1980), pp. 517-520.

  230. Kay, RF; Simons, EL, The ecology of Oligocene African Anthropoidea, International Journal of Primatology, vol. 1 no. 1 (1980), pp. 21-37, Springer Nature.

  231. Kay, RF, Physical Anthropology: Analysis of Species‐Specific Molar Adaptations in Strepsirhine Primates. Daniel Seligsohn, American Anthropologist, vol. 81 no. 4 (December, 1979), pp. 970-971, Wiley.

  232. Kay, RF; Simons, EL, Ecology of Oligocene African Anthropoidea, American Journal of Physical Anthropology, vol. 50 no. 3 (1979), pp. 453-453, WILEY-LISS.

  233. Kay, RF; Sheine, WS, On the relationship between chitin particle size and digestibility in the primate Galago senegalensis, Am. J. Phys. Anthropol., vol. 50 no. 3 (1979), pp. 301-308.

  234. Kay, RF; Sussman, RW; Tattersall, I, Dietary and dental variations in the genus Lemur, with comments concerning dietary-dental correlations among Malagasy primates., American journal of physical anthropology, vol. 49 no. 1 (July, 1978), pp. 119-127.

  235. Kay, RF; Sheine, WS, A model for the comparison of mastication efficiency in primates, American Journal of Physical Anthropology, vol. 48 (1978), pp. 110-111.

  236. Kay, RF, Diets of early Miocene African hominoids, Nature, vol. 268 no. 5621 (December, 1977), pp. 628-630, Springer Nature.

  237. Kay, RF, The evolution of molar occlusion in the Cercopithecidae and early Catarrhines., American journal of physical anthropology, vol. 46 no. 2 (March, 1977), pp. 327-352.

  238. Sheine, WS; Kay, RF, An analysis of chewed food particle size and its relationship to molar structure in the primatesCheirogaleus medius andGalago senegalensis and the insectivoranTupaia glis, American Journal of Physical Anthropology, vol. 47 no. 1 (January, 1977), pp. 15-20, WILEY.

  239. Kay, RF; Cartmill, M, Cranial morphology and adaptations of Palaechthon nacimienti and other paromomyidae (Plesiadapoidea, ? primates), with a description of a new genus and species, Journal of Human Evolution, vol. 6 no. 1 (January, 1977), pp. 19-53, Elsevier BV.

  240. Kay, RF, Prosimian Biology, a review, American Scientist (1976).

  241. Kay, RF, Evolution of molar function in catarrhines, American Journal of Physical Anthropology, vol. 44 (1976), pp. 190.

  242. Hylander, W; Kay, RF, Maxillary premolar reduction in the golden monkey, Journal of Dental Research, vol. 54 no. 6 (December, 1975), pp. 1242.

  243. Kay, RF, The functional adaptations of primate molar teeth., American journal of physical anthropology, vol. 43 no. 2 (September, 1975), pp. 195-216.

  244. KAY, RF; CARTMILL, M, SKULL OF PALAECHTHON AND COMMENTS ON ECOLOGICAL ADAPTATIONS OF PLESIADAPOIDEA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 42 no. 2 (January, 1975), pp. 311-311, WILEY-LISS.

  245. KAY, RF, ALLOMETRY AND EARLY HOMINIDS - COMMENT, SCIENCE, vol. 189 no. 4196 (January, 1975), pp. 63-63, AMER ASSOC ADVANCEMENT SCIENCE.

  246. Hylander, WL; Kay, RF, Maxillary premolar reduction in the golden monkey (Rhinopithecus roxellanae), Journal of Dental Research, vol. 54 no. 6 (1975), pp. 1242.

  247. Kay, RF; Cartmill, M, Skull of Palaechthon nacimienti, Nature, vol. 252 no. 5478 (December, 1974), pp. 37-38, Springer Nature.

  248. Kay, RF, Body size, molar structure and diet in primates, American Journal of Physical Anthropology, vol. 41 (December, 1974), pp. 487-488.

  249. Kay, RF; Hiiemae, KM, Jaw movement and tooth use in recent and fossil primates., American journal of physical anthropology, vol. 40 no. 2 (March, 1974), pp. 227-256.

  250. Kay, RF, Letter: Humerus of robust Australopithecus., Science (New York, N.Y.), vol. 182 no. 4110 (October, 1973), pp. 396.

  251. Kay, RF, Mastication, Molar Tooth Structure and Diet in Primates, Dissertation Abstracts International, Dissertation Abstracts International, vol. B34 (1973), pp. 5293.

Book Reviews

  1. R.F. Kay, Review of The Primate Fossil Record, edited by W. Hartwig, American Journal of Human Biology, vol. 15 no. 6 (2003), pp. 839-840.

  2. R.F. Kay, Review of Adaptive Radiations of Neotropical Primates, edited by M. A. Norconk, A. L. Rosenberger, and P. A. Garber, International Journal of Primatology (2000).

  3. Kay, R.F., Sexual Dimorphism in Living and Fossil Primates, edited by M. Pickford and B. Chiarelli, vol. 8 (1987), pp. 93-95.

  4. Kay, R.F., Primate Evolution, edited by J.G. Else and P.C. Lee, vol. 62 (1987), pp. 451.

Other

  1. Kay, R.F., Mastication, molar tooth structure and diet in primates, Ph. D. dissertation (1973), pp. 450, Yale University: New Haven, CT.

Papers Presented/Symposia/Abstracts

  1. Morse, PE; Pampush, JD; Kay, RF, Molar sharpness maintained with wear in the early anthropoids Apidium and Aegyptopithecus, AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY, vol. 177 (2022), pp. 128-128.

  2. Morse, PE; Stock, MK; Kay, RF; Williams, BA, Shearing ratios of Aycross anaptomorphine omomyids: Support for a middle Eocene refugium habitat, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 174 (2021), pp. 74-74.

  3. Pampush, JD; Morse, PE; Fuselier, EJ; Kay, RF, Ratios of Dental Surface Concavity and Convexity: Implications for Dental Topography Analyses, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 174 (2021), pp. 81-81.

  4. Kay, RF; Perry, JMG; Vizcaano, SF; Bargo, MS, A skeleton of HomunculuspatagonicusAmeghino, 1891 from the Santa Cruz Formation (Early Miocene, Patagonia), AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 171 (March, 2020), pp. 138-138, WILEY.

  5. Morse, PE; Pampush, JD; Kay, RF, Junk DNE: How Surface Simplification and Scanning Resolution Affect Measures of Dental Crown Sharpness, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 168 (March, 2019), pp. 169-169, WILEY.

  6. Lundeen, IK; Kay, RF, Olfactory system anatomy in Homunculus and the ecological importance of olfactory cues among stem platyrrhines, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 168 (March, 2019), pp. 148-149, WILEY.

  7. Gonzales, LA; Kay, RF; Salenbien, W; Angel Valdivia, L; Bejar, G; Chornogubsky, L; Martinez, J-N; Rigsby, CA; Baker, PA, New Early Miocene primate bearing faunal assemblage from the Alto Madre de Dios, Peru, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 165 (April, 2018), pp. 101-102, WILEY.

  8. Pampush, JD; Morse, PE; Chester, SGB; Spradley, JP; Williams, BA; Glander, KE; Teaford, MF; Kay, RF, Dental Topography and Food Processing in Wild-Caught Costa Rican Alouatta, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 165 (April, 2018), pp. 198-198, WILEY.

  9. Pampush, JD; Spradley, JP; Gladman, JT; Griffith, D; Gonzales, LA; Kay, RF, Platyrrhine dynamic dental topography: implications for secondary dental morphology in brachydont, long-lived taxa, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 162 (April, 2017), pp. 308-309, WILEY.

  10. Kay, RF; Williams, BA, Are there any African Platyrrhines?, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 162 (April, 2017), pp. 239-240, WILEY.

  11. Pampush, JD; Harrington, AR; Spradley, JP; Vining, AQ; Allen, KL; Kay, RF, Quantitative Occlusal Surface Complexity Metrics and Dental Wear in Alouatta palliata, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 159 (March, 2016), pp. 247-247, WILEY-BLACKWELL.

  12. Spradley, JP; Pampush, JD; Kay, RF, Environmental Variation Explains Mammalian Niche Structure in Central and South America, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 159 (March, 2016), pp. 299-299, WILEY-BLACKWELL.

  13. Gonzales, LA; Malinzak, MD; Kay, RF, The influence of brain size on canal radius of curvature, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 159 (March, 2016), pp. 157-158, WILEY-BLACKWELL.

  14. Spradley, JP; Williams, BA; Kay, RF, Environmental Variables Affecting Primate Species Richness in the Neotropics, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 156 (March, 2015), pp. 294-294, WILEY-BLACKWELL.

  15. Gonzales, LA; Malinzak, MD; Kay, RF, Intraspecific Semicircular Canal Variance-A Missing Element in Adaptive Scenarios?, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 156 (March, 2015), pp. 149-150, WILEY-BLACKWELL.

  16. Spradley, JP; Glander, KE; Kay, RF, Environmental stress and molar wear in three populations of mantled howling monkeys (Alouatta palliata), AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 153 (March, 2014), pp. 244-244, WILEY-BLACKWELL.

  17. Winchester, JM; Boyer, DM; St Clair, EM; Gosselin-Ildari, AD; Cooke, SB; Ledogar, JA, Dental topography of platyrrhines and prosimians: convergence and contrasts., American journal of physical anthropology, vol. 153 no. 1 (January, 2014), pp. 29-44.

  18. Cuitiño JI, Fernicola JC, Vizcaíno SF, Bargo MS, and Kay RF., Variaciones proximales-distales (O-E) en la Formación Santa Cruz, Mioceno de la Cuenca Austral. XIV Reunión Argentina de Sedimentología, Puerto Madryn Abstracts Volume:89-90., XIV Reunión Argentina de Sedimentología, Puerto Madryn, vol. abstracts volume (2014), pp. 89-90.

  19. Ludeman, EM; Kirk, EC; Gosselin-Ildari, AD; Blaylock, A; Kay, RF; Godinot, M, Cochlear labyrinth volume and predicted hearing abilities in Adapis, Necrolemur, Homunculus, and Tremacebus., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 150 (January, 2013), pp. 183-184, WILEY-BLACKWELL.

  20. Gonzales, LA; Malinzak, MD; Kay, RF, Semicircular canal morphology as a predictor of platyrrhine locomotor behavior., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 150 (January, 2013), pp. 133-133, WILEY-BLACKWELL.

  21. Fernicola, JC; Vizcaíno, SF; Bargo, MS; Kay, RF; Cuitiño, JI; Toledo, N; Muñoz, NA; Krapovikas, V; Chornogubsky, L; Hernandez del Piño, S; Gonzales, L, Localidades fosilíferas de la Formación Santa Cruz (Mioceno Inferior) en el margen meridional del valle del río Santa Cruz, provincia de Santa Cruz, Argentina, X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología, vol. Actas (2013), pp. 164.

  22. Cooke, SB; Kay, RF, Dental morphology and dietary adaptation in Homunculus patagonicus., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 147 (January, 2012), pp. 119-120, WILEY-BLACKWELL.

  23. Hunt, KD; Kay, RF, ORIGIN OF THE GREATER ANTILLEAN PRIMATE FAUNA, JOURNAL OF VERTEBRATE PALEONTOLOGY, vol. 32 no. 6 (January, 2012), pp. 114-114, TAYLOR & FRANCIS INC.

  24. Kay, RF; Vizcaino, SF; Bargo, MS, THE PALEOENVIRONMENT AND PALEOECOLOGY OF THE COASTAL MIOCENE SANTA CRUZ FORMATION (LATE EARLY MIOCENE, ARGENTINA), JOURNAL OF VERTEBRATE PALEONTOLOGY, vol. 32 no. 6 (January, 2012), pp. 119-119, TAYLOR & FRANCIS INC.

  25. Allen, KL; Kay, RF, ENDOCAST SHAPE AND BRAIN PROPORTIONS IN PRIMATES, JOURNAL OF VERTEBRATE PALEONTOLOGY, vol. 32 no. 6 (January, 2012), pp. 55-55, TAYLOR & FRANCIS INC.

  26. Allen, KL; Kay, RF; Hunt, KD; Beeker, CD; Conrad, GW; Keller, J, Brain size and endocranial morphology of Antillothrix (Holocene, Dominican Republic, Hispaniola), AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 147 (January, 2012), pp. 82-82, WILEY-BLACKWELL.

  27. Malinzak, M; Kay, RF; Hullar, TE, Semicircular canal orthogonality, not radius, best predicts mean speed of locomotor head rotation: a new hypothesis with implications for reconstructing behaviors in extinct species., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 144 (January, 2011), pp. 204-204, WILEY-BLACKWELL.

  28. Kay, RF; Allen, KL, Dietary quality and brain size in platyrrhines: support for the "Expensive Tissue Hypothesis"., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. Suppl. 48 (January, 2009), pp. 163-163, WILEY-LISS.

  29. Krueger, KL; Scott, JR; Ungar, PS; Kay, RF, Comparisons of dental microwear texture attributes between facets in three primate taxa, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. Suppl. 46 (January, 2008), pp. 135-135, WILEY-LISS.

  30. Malinzak, M; Kay, RF; Sims, EL; Queen, R, Characterization of primate head accelerations during locomotion: A novel application of 3D motion analysis with comparative implications., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. Suppl. 46 (January, 2008), pp. 147-148, WILEY-LISS.

  31. Kay, RF; Kirk, EC, New data on encephalization in Miocene New World monkeys: implications for anthropoid brain evolution, Journal of Vertebrate Paleontology, vol. 28 (2008), pp. 151A.

  32. Perry, JMG; Kay, RF; Vizcaino, SF; Bargo, MS, First Cranial Material of a Juvenile Monkey from the Tertiary of South America: Cranial Anatomy and Dental Eruption Sequence, Journal of Vertebrate Paleontology, vol. 28 (2008), pp. 127A.

  33. Teaford, MF; Grine, FE; Kay, RF; Schubert, BW; Ungar, PS, Low magnification dental microwear: The problem of postmortem artifacts, Journal of Vertebrate Paleontology, vol. 28 (2008), pp. 151A.

  34. Kay, RF; Simons, E; Ross, JL, The Basicranial Anatomy of African Eocene/Oligocene Anthropoids. Are There Any Clues for Platyrrhine Origins?, in Elwyn Simons: A Search for Origins, edited by Fleage J.G., Gilbert, C. C. (2008), pp. 125-158, Springer New York.

  35. Kay, RF; Rae, TC; Koppe, T; Colbert, MW, Paranasal pneumatization in the early Miocene platyrrhine Homunculus patagonicus, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. Supplement 41 (January, 2006), pp. 112-112, WILEY-LISS.

  36. Mitchell, TRT; Schmitt, D; Kay, RF, The role of binocular vision in primate locomotion., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. Suppl. 41 (January, 2006), pp. 132-133, WILEY-LISS.

  37. Vizcaino S.F., Bargo M.S., Kay R.F., Reconstructing the paleoecology of the Santacrucian fauna (Early-Middle Miocene; Patagonia; Argentina) From form and function. Armadillo and primate examples., Journal of Vertebrate Paleontology, vol. 26 (2006), pp. 135A.

  38. Kay, RF; Kirk, EC; Malinzak, M; Colbert, MW, Brain size, activity pattern, and visual acuity in Homunculus patagonicus, an early Miocene stem platyrrhine: the mosaic evolution of brain size and visual acuity in Anthropoidea., Journal of Vertebrate Paleontology, vol. 26 (2006), pp. 83A-84A.

  39. Kay, RF; Takai, M, Pitheciidae and other platyrrhine seed predators: the dual occupation of the seed predator niche during platyrrhine evolution. (2006), pp. 511, International Journal of Primatology.

  40. Perry, JMG; Kay, RF; Colbert, MW, Tooth root size and chewing muscle leverage in Homunculus, a Miocene Primate from Patagonia., Journal of Vertebrate Paleontology, vol. 26 (2006), pp. 110A.

  41. Vizcaíno, SF; Bargo, MS; Kay, RF, Morfología y paleobiología de vertebrados. Aplicación a los mamíferos de la Formación Santa Cruz (Mioceno temprano-medio), Patagonia, Argentina, IX Congreso Argentino de Paleontología y Bioestratigrafía, 18 -22 de septiembre, Córdoba, Argentina (2006), pp. 144.

  42. Vizcaíno, SF; Bargo, MS; Kay, RF, Reconstructing the paleoecology of the Santacrucian fauna (Early-Middle Miocene; Patagonia; Argentina) From form and function. Armadillo and primate examples., Journal of Vertebrate Paleontology, vol. 26 (2006), pp. 135A.

  43. Kay, R .F. Vizcano, S. F. Tauber, A. A. Bargo, M. S. Williams, B. A Luna, C. Colbert, M. W., Three newly discovered skulls of Homunculus patagonicus support its position as a stem platyrrhine and establish its diurnal arboreal folivorous habits., American Journal of Physical Anthropology (2005).

  44. Teaford, MF, Back to the future, Evolutionary Anthropology: Issues, News, and Reviews, vol. 13 no. 5 (January, 2004), pp. 198-199, Wiley.

  45. Mitchell, TRT; Kay, RF; Colbert, MW; Rowe, TB, The interorbital region of Dolichocebus gaimanensis (Platyrrhini, early Miocene, Argentina) based on high resolution X-ray CT imaging-phylogenetic implications., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (January, 2004), pp. 148-148, WILEY-BLACKWELL.

  46. Kay, RF; Rossie, JB; Colbert, MW; Rowe, TB, Observations on the olfactory system of Tremacebus harringtoni (Platyrrhini, early Miocene, Sacanana, Argentina) based on high resolution X-ray CT scans., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (January, 2004), pp. 123-124, WILEY-BLACKWELL.

  47. Tauber, A.A., R.F. Kay, and C. Luna, Killik Aike Norte, una localidad clásica de la Formación Santa Cruz (Mioceno temprano-medio), Patagonia, Argentina (2004), Ameghiniana.

  48. Kay, R.F., J.B. Rossie, M.W. Colbert, and T. Rowe, Observations on the olfactory system of Tremacebus harringtoni (Platyrrhini, early, Supplement 35, Am. J. Phys. Anthropol (2004).

  49. T.R.T. Mitchell, Kay, R.F., M.W. Colbert, and T.R. Rowe, The interorbital region of Dolichocebus gaimanensis (Platyrrhini, early Miocene,, Supplement 35, American Journal of Physical Anthropology (2004).

  50. Vucetich, G. Carlini, A. Madden, R, M. Kay, R .F. Vieytes, E. C., Nuevos hallazgos entre los más antiguos roedores de América del Sur: una dispersión post transición Eoceno-Oligoceno, Asociacion Paleontologica Argentina, Reunin Anual de Communicaciones Carlini, A. Madden, R, M. Kay, R .F. Vieytes, E. C. (2004), pp. 29.

  51. Vizcaino, S. F. Bargo, M. S. Kay, R .F., Functional remarks on the humerus of anteaters (Mammalia, Vermilingua) from Santa Cruz Formation (early Middle Miocene), Asociacion Paleontologica Argentina, Reunin Anual de Communicaciones Carlini, A. Madden, R, M. Kay, R .F. Vieytes, E. C. (2004), pp. 29.

  52. Tauber, A. A.Kay, R .F.Luna, C., Killik Aike Norte, una localidad clásica de la Formación Santa Cruz (Mioceno temprano-medio), Patagonia, Argentina, Ameghiniana (2004).

  53. Madden, R, M. Kay, R .F. Heizler, M. Vilas, F. Re, G., Geochronology of the Sarmiento Formation at Gran Barranca and elsewhere in Patagonia: calibrating middoe Cenozoic mammal evolution in South America, Journal of Vertebrate Paleontology, vol. 24, suppl to #3 (2004), pp. 87A.

  54. Madden, R; Carlini, A; Vucetich, G; Kay, R; Heizler, M; Vilas, F; Re, G; Kohn, MJ; Zucol, A; Bellosi, ES, The terrestrial Eocene-Oligocene transition at Gran Barranca in Patagonia, Symposium on the Paleogene, Belgium (2004), pp. P-38.

  55. Madden, R; Carlini, A; Vucetich, MG; Kay, R; Heizler, M; Vilas, F; Re, G; Kohn, MJ; Zucol, A; Bellosi, ES, Gran Barranca: the most complete South American middle Cenozoic sequence., in Symposium on the Paleogene, Symposium on the Paleogene, Belgium, vol. Abstracts and Program Book (2004), pp. P-39.

  56. Mitchell, TRT; Kay, RF; Colbert, MW; Rowe, TR, The interorbital region of Dolichocebus gaimanensis (Platyrrhini, early Miocene, Argentina) based on high resolution X-ray CT imaging—phylogenetic implications., American Journal of Physical Anthropology, vol. Supplement 35 (2004), pp. 124.

  57. Vizcaino, SF; Bargo, MS; Tauber, AA; Kay, RF, Myrmecophagidae (Mammalia, Xenarthra) de edad Santacrucense (Mioceno temprano-medio)., Ameghiniana (2004).

  58. Vucetich, G; Carlini, A; Madden, R; Kay, CN; Vieytes, EC, Nuevos hallazgos entre los más antiguos roedores de América del Sur: una dispersion post-transición Eoceno-Oligoceno, Resumenes de Comunicaciones de la Asociación Argentina de Paleontologia (Diamante, Argentina), vol. 2004 (2004), pp. 29.

  59. Vucetich, G; Carlini, A; Madden, R; Kay, RF, New Discoveries among the Oldest Rodents in South America: How Old and How Primitive?, Journal of Vertebrate Paleontology, vol. 24 (2004), pp. 125A.

  60. Kay, RF; Mitchell, TRT, Cranial evidence for the timing of the platyrrhine-catarrhine divergence., AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (January, 2003), pp. 127-127, WILEY-LISS.

  61. Madden, R; Carlini, A; Vucetich, G; Kay, R; Heizler, M; Vilas, F; Re, G; Kohn, MJ; Zucol, A; Bellosi, ES, The terrestrial Eocene-Oligocene transition at Gran Barranca in Patagonia (2003), pp. P-38.

  62. Madden, R; Carlini, A; Vucetich, MG; Kay, R; Heizler, M; Vilas, F; Re, G; Kohn, MJ; Zucol, A; Bellosi, ES, Gran Barranca: the most complete South American middle Cenozoic sequence., vol. Abstracts and Program Book (2003), pp. P-39.

  63. Madden, R.H., R.F. Kay, M.G. Vucetich, M.M. Mazzoni, G.H. Re, M. Heizler, and H. Sandeman, Geochronologic age of the Casamayoran fauna at Gran Barranca, Chubut Province, Argentina (1998).

  64. Heizler, M; Kay, RF; Madden, RH; Mazzzoni, MM; Re, G; Sandeman, H; Vucetich, MG, Geochronologic age of the casamayoran fauna at Gran Barranca, Chubut Province, Argentina, Congreso Argentino de Paleontologia y Biostratigrafia, Congreso Argentino de Paleontologia y Biostratigrafia, vol. VII (1998), pp. 89.

  65. Kay, RF; Sanchez-Villagra, MR, Skull of Hondalagus, an argyrolagid marsupial from the Middle Miocene of Bolivia, Journal of Vertebrate Paleontology (1997).

  66. Kay, RF; Johnson, DD, New platyrrhines from the middle Miocene of Argentina, American Journal of Physical Anthropology, vol. Suppl. 22 (1996), pp. 136-137.

  67. Kay, RF; Madden, RH; Mazzoni, MM, Calibraciones de edades mamifero en la Gran Barranca del Lago Colhue Huapi, Provincia del Chubut, Argentina., Simposio “Paleogeno de América del Sur", B. Aires, Simposio “Paleogeno de América del Sur". B. Aires, vol. 1 Octubre de 1996 (1996), pp. 14.

  68. Ungar, PS; Kay, RF; Teaford, MF; Walker, A, Dental evidence for diets of Miocene apes, American Journal of Physical Anthropology, vol. Suppl. 22 (1996), pp. 232-233.

  69. Kay, R.F., B.J. McFadden, R.H. Madden, F. Anaya, and E. Farrar, New radiomentric dates confirm late Oligocene age of Deseadan Salla beds, Bolivia, and the oldest known South American primate, Journal of Vertebrate Paleontology, vol. 15 (Suppl. 3) (1995), pp. 38A.

  70. Kay, RF; Williams, BA, Recent finds of monkeys from the Oligocene/Miocene of Salla, Bolivia, American Journal of Physical Anthropology, vol. Suppl. 20 (1995), pp. 124.

  71. Madden, RH; Guerrero, J; Kay, RF; Flynn, JJ; Swisher/III, CC; Walton, AH, The Laventan Stage and Laventan Age; New Chronostratigraphic and geochronologic units for the Miocene of South America, VI Argentine Congress of Paleontol. and Biostratigraphy, Trelew-Chubut, Argentina, vol. April 3-8, 1994 (1994).

  72. Meldrum, DJ; Kay, RF; Chiu, CH, Phylogenetic relationships of Cebus and Saimiri inferred from mitochondrial DNA sequences and dental anatomy, American Journal of Physical Anthropology, vol. Suppl. 16 (1993), pp. 144-145.

  73. Madden, RH; Kay, RF, Aportes al conocimiento de la fauna de mamiferos del Grupo Honda, Mioceno, Colombia, IX Jornadas Argeninas de Paleontologia de Vertebrados, Trelew, Chubut, IX Jornadas Argeninas de Paleontologia de Vertebrados, Trelew, Chubut (1992), pp. 12 al 15 de Mayo.

  74. Williams, BA; Kay, RF, Phylogenetic analysis of Eocene primates suggests Omomyidae is not a monophyletic group, XIV Int. Primatol. Congress, Strasbourg, France (1992), pp. 286.

  75. Ford, SM; Davis, LC; Kay, RF, New platyrrhine astragalus from the Miocene of Colombia, American Journal of Physical Anthropology, vol. Supplement 12 (1991), pp. 73-74.

  76. Kay, RF; Anthony, MRL, Dietary evolution in platyrrhine primates and the comparative method, Journal of Vertebrate Paleontology, vol. 11 no. 3 (1991), pp. 39.

  77. KAY, RF, A POSSIBLE GIANT TAMARIN FROM THE MIOCENE OF COLOMBIA, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 81 no. 2 (February, 1990), pp. 248-248, WILEY-LISS.

  78. Kay, R. F. & Fleagle, J. G., The phylogenetic position of Parapithecidae (Primates, Anthropoidea), American Journal of Physical Anthropology, vol. 75 (December, 1988), pp. 230.

  79. MADDEN, RH; KAY, RF, NEW STIRTONIA-VICTORIAE MATERIAL FROM THE MIOCENE OF COLOMBIA, INTERNATIONAL JOURNAL OF PRIMATOLOGY, vol. 8 no. 5 (October, 1987), pp. 473-473, PLENUM PUBL CORP.

  80. KAY, RF; COVERT, HH, SPECIES NUMBER DETERMINATION AND SPECIMEN ALLOCATION IN FOSSIL SAMPLES, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 57 no. 2 (January, 1982), pp. 201-201, WILEY-LISS.

  81. KAY, RF, THE ADAPTIVE SIGNIFICANCE OF ENAMEL THICKNESS WITH IMPLICATIONS FOR HOMINID ORIGINS, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 52 no. 2 (January, 1980), pp. 243-243, WILEY-LISS.

  82. SIMONS, EL; KAY, RF; FLEAGLE, JG, RECENTLY RECOVERED OLIGOCENE APES FROM EGYPT, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 52 no. 2 (January, 1980), pp. 279-279, WILEY-LISS.

  83. R.F. Kay, The adaptative significance of enamel thickness with implications for hominoid origins, Am. J. Phys. Anthropol., vol. 52 (1980), pp. 243.

  84. KAY, RF; SHEINE, WS, MODEL FOR COMPARISON OF MASTICATORY EFFICIENCY IN PRIMATES, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 48 no. 3 (January, 1978), pp. 410-411, WILEY-LISS.

  85. KAY, RF, POST-OLIGOCENE EVOLUTION OF CATARRHINE DIETS, AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, vol. 47 no. 1 (January, 1977), pp. 141-142, WILEY-LISS.

  86. Cartmill, M; Kay, RF, Craniodental morphology and development and the problem of tarsier affinities, VI Int. Cong. Primatology, Abstracts, vol. Abstract volume (1976), pp. 93.

  87. Hiemae, K; Kay, RF, Trends in the evolution of primate mastication., Nature, vol. 240 no. 5382 (December, 1972), pp. 486-487.

Others

  1. Kay, RF, Mastication, molar tooth structure and diet in primates. Ph. P. dissertation (1973).

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