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Publications of Richard F Kay     :chronological  combined  bibtex listing:

Books

  1. Ross, C.F. and R.F. Kay, Anthropoid Origins: New Visions (Advances in Primatology) (2004), pp. 747, Kluwer/Plenum
  2. Plavcan, J.M., R.F. Kay, W.L. Jungers, and C. van Schaik, Reconstructing Behavior in the Primate Fossil Record, in Advances in Primatology (2001), pp. 350, New York: Kulwer/Plenum Publishers
  3. Kay, R.F., R.H. Madden, R.L. Cifelli, and J.J. Flynn, Vertebrate Paleontology in the Neotropics (1997), pp. 592, Washington, D.C.: Smithsonian Institution Press

Book Sections/Chapters

  1. Kay R.F., Simons E.L., Ross J., The basicranial anatomy of African Eocene/Oligocene anthropoids. Are there any clues for platyrrhine origins?, edited by Fleage J.G., Gingerich P.D. (2007, in press)
  2. Teaford, M., Ungar, P.,Kay, R.F., Molar shape and molar microwear in the Koobi Fora monkeys: ecomorphological implications, in Koobi Fora Research Project, Volume VI, Monkeys, edited by Jablonski, N.,M.G. Leakey (2006), California Academy of Sciences: San Francisco
  3. Ross, C.F. and R.F. Kay, Evolving perspectives on Anthropoidea, in Anthropoid Origins: New Visions, edited by C.F. Ross and R.F. Kay (2004), pp. 3-41, Kulwer/Plenum: New York
  4. Ross, C.F. and R. Kay, F, Anthropoid Origins: Retrospective and Prospective, in Anthropoid Origins: New Visions, edited by C.F. Ross and R.F. Kay (2004), pp. 699-737, Kluwer/Plenum Publishing: New York
  5. Kirk, E.C. and R.F. Kay, The Evolution of High Visual Acuity in the Anthropoidea, in Anthropoid Origins: New Visions, edited by C.F. Ross and R.F. Kay (2004), pp. 539-602, Kluwer/Plenum Publishing: New York
  6. 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
  7. Kay, R.F., B.A. Williams, and F. Anaya, The adaptations of Branisella boliviana, the earliest South American Monkey, in Reconstructing Behavior in the Primate Fossil Record, edited by Plavcan, J. M. Kay, R. F. Jungers, W. L. van Schaik, C. (2002), pp. 339-370, Kulwer/Plenum Publishers: New York
  8. 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)
  9. Van Couvering, J.A. and R.F. Kay, Oligocene, in Encyclopedia of Evolution and Prehistory, 2nd Edition, 2nd Edition, edited by E. Delson (2000), pp. 489-490, Garland Pub. Co: New York
  10. R.F. Kay, Teeth, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by E. Delson, et al. (2000), pp. 695-703, Garland Pub. Co.: New York
  11. Kay, R.F. and E. Delson, Oligopithecidae, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by E. Delson, et al. (2000), pp. 490-493, Garland Pub. Co.: New York
  12. Kay, R.F. and J.A. Van Couvering, Fayum, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by E. Delson, et al. (2000), pp. 265-267, Garland Pub. Co: New York
  13. R.F. Kay, Diet, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by E. Delson, et al. (2000), pp. 208-212, Garland Pub. Co.: New York

Papers Published

  1. Williams, S.H. and R.F. Kay, A comparative test of competing adaptive explanations for hypsodonty in ungulates and rodents, Programa y Resúmenes, Evolución Neotropical del Cenozoico,La Paz, Bolivia (1999), pp. 46
  2. Kay, R.F., R. Madden, M., M.G. Vucetich, A.A. Carlini, M.M. Mazzoni, G.H. Ré, M. Heizler, and H. Sandeman, Revised age of the Casamayoran South American land Mammals 'Age'-- climatic and biotic implications, Proc. Natn. Acad. Sci. (USA), vol. 96 no. 23 (1999), pp. 13235-13240
  3. 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)
  4. Kay, R.F., M.C. Cartmill, and M. Balow, The hypoglossal canal and the origin of human vocal behavior, Proc. Natn. Acad. Sci. (USA), vol. 95 (1998), pp. 5417-5419
  5. Heizler, M., R.F. Kay, R.H. Madden, M.M. Mazzzoni, G. Re, H. Sandeman, and M.G. Vucetich, Geochronologic age of the casamayoran fauna at Gran Barranca, Chubut Province, Argentina, Congreso Argentino de Paleontologia y Biostratigrafia, vol. VII (1998), pp. 89
  6. Meldrum, D.J. and R.F. Kay, The postcranial skeleton of Miocene platyrrhine primates, in Vertebrate Paleontology in the Neotropics, edited by R.F. Kay, et al. (1997), pp. 459-472, Smithsonian Institution Press: Washington, D.C.
  7. 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.
  8. Kay, R.F., R.H. Madden, C. Van Schaik, and D. Higdon, Primate species richness is determined by plant productivity: implications for conservation, . Procedings of the National Academy of Sciences (USA), vol. 94 (1997), pp. 13023-13027
  9. Kay, R.F. and P. Ungar, 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, D. R., C. Ward, and M. Rose (1997), pp. 131-151, Plenum Press: New York
  10. Kay, R.F. and R.H. Madden, Paleogeography and paleoecology, in Vertebrate Paleontology in the Neotropics, edited by R.F. Kay, et al. (1997), pp. 520-550, Smithsonian Institution Press: Washington, D. C.
  11. Fleagle, J.G. and R.F. Kay, Platyrrhines, catarrhines and the fossil record, in New World Primates: Ecology, Evolution and Behavior, edited by W.G. Kinzey (1997), pp. 3-24, Aldine: New York
  12. Fleagle, J.G., R.F. Kay, and M.R.L. Anthony, Fossil New World monkeys, in Vertebrate Paleontology in the Neotropics, edited by R.F. Kay, et al. (1997), pp. 473-495, Smithsonian Institution Press: Washington, D. C.
  13. Kay, R.F., R.H. Madden, and M.M. Mazzoni, , Calibraciones de edades mamifero en la Gran Barranca del Lago Colhue Huapi, Provincia del Chubut, Argentina, Simposio “Paleogeno de América del Sur", B. Aires (1 Octubre de 1996), pp. 14
  14. Carlini, A., R.H. Madden, G. Lopez, R.F. Kay, M.G. Vucetich, M. Bond, and T. Jordan, Nuevos mamiferos de la Formacion Chinches (Mioceno) de la Cordillera Frontal de San Juan, Argentina, XIII Jornadas Argeninas de Paleontologia de Vertebrados, Resumenes (1996)
  15. Ungar, P.S. and R.F. Kay, The dietary adaptations of European Miocene catarrhines, Proc. Natl. Acad. Sci. USA, vol. 92 (1995), pp. 5479-5481
  16. Madden, R.H., J. Guerrero, R.F. Kay, J.J. Flynn, C.C. Swisher/III, and A.H. Walton, 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 (April 3-8, 1994)
  17. 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
  18. 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
  19. Fleagle, J.G. and R.F. Kay, Anthropoid Origins: The Fossil Evidence (1994), pp. 708, Plenum Press: New York
  20. Anthony, M.R.L. & Kay, R. F., Tooth form and diet in ateline and alouattine primates: reflections on the comparative method, Am. J. Sci, vol. 283A (December, 1993), pp. 356-382
  21. Kay, R. F. & Frailey, C. D., Fossil platyrrhines from the Rio Acre local fauna, late Miocene, western Amazonia, J Hum. Evol., vol. 36 (December, 1993)
  22. Kay, R. F. & Frailey, C. D., Fossil platyrrhines from the Rio Acre local fauna, late Miocene, western Amazonia, J Hum. Evol., vol. 25 (December, 1993), pp. 319-327
  23. Williams, B.A. and R.F. Kay, Phylogenetic analysis of Eocene primates suggests Omomyidae is not a monophyletic group, XIV Int. Primatol. Congress, Strasbourg, France (1992), pp. 286
  24. Rasmussen, D.T. and R.F. Kay, 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 K.E. Campell (1992), pp. 225-230
  25. Madden, R.H. and R.F. Kay, Aportes al conocimiento de la fauna de mamiferos del Grupo Honda, Mioceno, Colombia, IX Jornadas Argeninas de Paleontologia de Vertebrados, Trelew, Chubut (1992: p. 12 al 15 de Mayo)
  26. Kay, R.F. and B.A. Williams, Dental evidence for anthropoid origins, vol. Suppl. 14 (1992), pp. 98
  27. Kay, R.F., R.H. Madden, and J.G. D., Nuevos hallazgos de monos del Mioceno de Colombia, Ameghiniana, vol. 25 (1990), pp. 203-213
  28. Kay, R.F. and F.E. Grine, Tooth Morphology, wear, and diet in Austrolopithecus and Paranthropus, The Evolutionary History of the Robust Austrolopithecus, edited by F.E. Grine (1989), pp. 427-447, Aldine de Gruyter: New York
  29. Grine, F. E. & Kay, R. F., Early honimid diets from a quantitative analysis of dental microwear, Nature, vol. 333 (December, 1988), pp. 765-768
  30. Kay, R. F. & Fleagle, J. G., The phylogenetic position of Parapithedidae (Primates, Anthropoidea), Am. J. Phys. Anthropol., vol. 75 (December, 1988), pp. 230
  31. Kay, R.F., Parapithecidae, in Encyclopedia of Human Evolution and Prehistory, edited by I. Tattersal, E. Delson, and J. VanCouvering (1988), pp. 440-443, Garland Pub.: New York
  32. Kay, R.F., Teeth, in Encyclopedia of Human Evolution and Prehistory, edited by I. Tattersal, E. Delson, and J. VanCouvering (1988), pp. 571-578, Garland Pub.: New York
  33. Kay, R.F., Diet, in Encyclopedia of Human Evolution and Prehistory, edited by I. Tattersal, E. Delson, and J. VanCouvering (1988), pp. 155-159, Garland Pub.: New York
  34. Kay, R.F., Oligocene, in Encyclopedia of Human Evolution and Prehistory, edited by I. Tattersal, E. Delson, and J. VanCouvering (1988), pp. 392-394, Garland Pub.: New York
  35. Kay, R.F., Fayum, in Encyclopedia of Human Evolution and Prehistory, edited by I. Tattersal, E. Delson, and J. VanCouvering (1988), pp. 205-206, Garland Pub.: New York
  36. Fleagle, J. & R.F. Kay, The phyletic position of the Parapithecidae, J. Hum. Evol, vol. 16 (December, 1987), pp. 483-532
  37. Kay, R.F., Major Topics in Primate and Human Evolution, edited by B. Wood, L. Martin and P. Andrews, review, American Scientist, vol. 75 (1987), pp. 312
  38. Kay, R.F., Sexual Dimorphism in Living and Fossil Primates, edited by M. Pickford and B. Chiarelli, vol. 8 (1987), pp. 93-95
  39. Kay, R.F., Primate Evolution, edited by J.G. Else and P.C. Lee, vol. 62 (1987), pp. 451
  40. Kay, R.F., Analysis of primate dental microwear using image processing techniques, Scanning Microscopy, vol. 1 (1987), pp. 657-662
  41. Kay, R.F., R.M. Madden, R.L. Cifelli, and J. Guerrero, A new specimen of Miocene Colombian Stirtonia, vol. 69 (1986), pp. 221
  42. Luchterhand, K., R.F. Kay, and R.H. Madden, Mohanamico hershkovitzi, gen. et sp. nov., un primate du Miocène moyen d'Amérique du Sud, vol. 303 no. II (1986), pp. 1753-1758
  43. Fleagle, J.G. and R.F. Kay, The paleobiology of catarrhines, in Ancestors: The Hard Evidence, edited by E. Delson (1985), pp. 23-36, Alan R. Liss, Inc.: New York
  44. Kay, R.F., The Order of Man by Charles Oxnard, review, vol. 59 (1984), pp. 480-481
  45. Kay, R.F. and H.H. Covert, Anatomy and behaviour of extinct primates, in Food Acquisition and Processing in Primates, edited by D.J. Chivers, B.A. Wood, and A. Bilsborough (1984), pp. 467-508, Plenum Press: New York
  46. Kay, R.F., On the Use of Anatomical Features to Infer Foraging Behavior in Extinct Primates, in Adaptations for Foraging in Nonhuman Primates, edited by J. Cant and P. Rodman (1984), pp. 21-53, Columbia University Press: New York
  47. Kay, R.F., D.T. Rasmussen, and K.C. Beard, Cementum annulus counts provide a mean for age determination in Macaca mulatta, vol. 42 (1984), pp. 85-95
  48. Kay, R. F. & Covert, H. H., True grit: a microwear experiment, Am. J. Phys. Anthropol., vol. 61 (December, 1983), pp. 33-38
  49. Kay, R.F. and E.L. Simons, A reassessment of the relationship between later Miocene and subsequent Hominoidea, in New Interpretations of Ape and Human Ancestry, edited by R.L. Ciochon and R.S. Corruccini (1983), pp. 577-624, Plenum Press: New York
  50. Kay, R.F., Advances in San Juan Basin Paleontology by Lucas, et al., an review, vol. 70 (1982), pp. 318
  51. Kay, R.F., Ramapithecines and Human Origins, in McGraw-Hill Yearbook of Science and Technology (1982), pp. 1-11
  52. R.F. Kay, Sexual dimorphism in the Ramapithecinae, Procedings of the National Academy (USA), vol. 79 (1982), pp. 209-212
  53. Kay, R.F., Sivapithecus simonsi, a new species of Miocene hominoid, with comments on the phylogenetic status of the Ramapithecinae, vol. 3 (1982), pp. 113-174
  54. Fleagle, J. G., Kay, R. F. & Simons, E. L., Sexual dimorphism in early anthropoids: response to Leutenegger, Naure, vol. 290 (December, 1981), pp. 609
  55. Kay, R. F., Fleagle, J. G. & Simons, E. L., A revision of the African Oligocene apes of the Fayum Province, Egypt, Am. J. Phys. Anthropol., vol. 55 (December, 1981), pp. 293-322
  56. Covert, H. H. & R.F. Kay, Dental microwear and diet: implications for determining the feeding behaviors of extinct primates, with a comment on the dietary pattern of Sivapithecus, Am. J. Phys. Anthropol., vol. 55 (December, 1981), pp. 331-336
  57. Simons, E.L. and R.F. Kay, Aegyptopithecus and Propliopithecus, McGraw-Hill Yearbook of Science and Technology (1981), pp. 77-80
  58. Kay, R.F. and E.L. Simons, Apidium and Parapithecus, McGraw-Hill Yearbook of Science and Technology (1981), pp. 103-105
  59. Fleagle, J. G., Kay, R. F. & Simons, E. L., Sexual dimorphism in early anthropoids, Nature, vol. 287 (December, 1980), pp. 328-330
  60. Covert, H. H. & R.F. Kay, Dental microwear and diet: implications for early hominoid feeding behavior, Am. J. Phys. Anthropol., vol. 52 (January, 1980), pp. 216
  61. Kay, R.F., Platyrrhine origins: a reappraisal of the dental evidence, in Evolutionary Biology of the New World Monkeys and Continental Drift, edited by R. Ciochon and B. Chiarelli (1980), pp. 159-188, Academic Press: New York
  62. 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
  63. Kay, R.F., Molar structure and diet in extant Cercopithecoidea, in Development, Function and Evolution of Teeth, edited by P.M. Butler and K. Joysey (1978), pp. 309-339, Academic Press: London
  64. 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.
  65. Fleagle, J.G. and R.F. Kay, New interpretations of the phyletic position of Oligocene hominoids, in New Interpretations of Ape and Human Ancestry, edited by R.L. Ciochon and R.S. Corruccini (1978), pp. 181-210, Plenum Press: New York
  66. Cartmill, M. and R.F. Kay, Cranio-dental morphology, tarsier affinities, and primate suborders, in Recent Advances in Primatology, Volume 3, Evolution, edited by D. Chivers and K. Joysey (1978), pp. 205-214, Academic Press: London
  67. Cartmill, M. and R.F. Kay, Craniodental morphology and development and the problem of tarsier affinities, VI Int. Cong. Primatology, Abstracts (1976), pp. 93
  68. Hylander, W. & Kay, R. F., Maxillary premolar reduction in the golden monkey, Journal of Dental Research, vol. 54 (December, 1975), pp. 1242
  69. Kay, R. F., Allometry and early hominids, Science, vol. 189 (December, 1975), pp. 61-64
  70. Kay, R. F., Body size, molar structure and diet in primates, Am. J. Phys. Anthropol., vol. 41 (December, 1974), pp. 487-488
  71. Kay, R. F. & Hiiemae, K. M., Jaw movement and tooth use in recent and fossil primates, Am J. Phys. Anthropol., vol. 40 (December, 1974), pp. 227-256
  72. Kay, R.F. and K.M. Hiiemae, Mastication in Galago crassicaudatus, a cinefluorographic and occlusal study, in Prosimian Biology, edited by R.D. Martin, G.A. Doyle, and A.C. Walker (1974), pp. 501-530, Duckworth: London
  73. Kay, R.F., Humerus of Robust Australopithecus, Science, vol. 182 (December, 1973), pp. 396
  74. Kay, R.F., Mastication, Molar Tooth Structure and Diet in Primates, Dissertation Abstracts International, vol. B34 (1973), pp. 5293
  75. Hiiemae, K.M. and R.F. Kay, Evolutionary trends in the dynamics of primate mastication, Symp. Fourth Int. Cong. Primatology, Vol 3: Craniofacial Biology of Primates, edited by M.R. Zingeser (1973), pp. 28-64, Karger: Basel
  76. Hiiemae, K.M. & Kay, R. F., Trends in the evolution of primate mastication, Nature, vol. 240 (December, 1972), pp. 486-487

Refereed Publications

  1. Kay, R.F., Fleagle, J.G., Mitchell, T.R.T., Colbert, M.W., Bown, T.M.,Powers, D.W.,, The anatomy of Dolichocebus gaimanensis, a primitive platyrrhine monkey from Argentina., Jounal of Human Evolution (2007, in press)
  2. R.F. Kay, Vizcaino, S. F., Bargo M.S., Perry J.M.G., Prevosti F., Fernicola J.C., Two new fossil vertebrate localities in the Santa Cruz Formation (late early Miocene, Argentina), ~51 degrees South latitude, South American Journal of Earth Sciences (2007 in press)
  3. Goin F.J., Sanchez Villagra M.R., Abello A., Kay R.F., A new generalized paucituberculatan marsupial from the Oligocene of Bolivia, and the origin of ‘shrew-like’ opossums., Ameghiniana (2007, in press)
  4. Tafforeau, P. Boistel, R. Boller, E. Bravin, A. Brunet ,M. Chaimanee, Y. Cloetens, P. Feist, M. Hoszowska J. Jaeger, J.-J. Kay, R. F. 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 (2006 in press)
  5. Vizcaino, S.F., Bargo, M.S., Kay, R.F.,Milne, The armadillos (Mammalia, Xenarthra, Dasypodidae) of the Santa Cruz formation (early-middle Miocene), Palaeogeography, Palaeoclimatology and Paleoecology, vol. 237 (2006), pp. 255-269
  6. Forasiepi, A.M., Sanchez Villagra, M.R., Goin, F., Madden, R., M., Takai, M., Shigahara, N.,Kay, R.F.,, A New Hathliacynidae (Metatheria, Sparassodonta) from the middle Miocene of Quebrada Honda, Bolivia, Journal of Vertebrate Paleontology, vol. 26 (2006), pp. 670-684
  7. Kay, R. F., 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 (2006), pp. 673-686
  8. Kohn, M.J., J.A. Josef, R. Madden, M., R.F. Kay, G. Vucetich, and A. Carlini, Climate stability across the Eocene-Oligocene transition, southern Argentina, Geology, vol. 32 (2004), pp. 621-624
  9. Kay, R.F., V.M. Campbell, J.B. Rossie, M.W. Colbert, and T. Rowe, The olfactory fossa of Tremacebus harringtoni (Platyrrhini, early Miocene, Sacanana, Argentina): Implications for activity pattern, Anat. Rec., vol. Part A, 281 A (2004), pp. 1157-1172
  10. R.F. Kay, A synopsis of the phylogeny and paleobiology of Amphipithecidae, South Asian middle and late Eocene primates, Anthropological Science (Japan) (2004), pp. 1-12
  11. Kay, R.F., D. Schmitt, C. Vinyard, J.M.G. Perry, M. Takai, N. Shigehara, and N. Egi, The paleobiology of Amphipithecidae, South Asian late Eocene primates, J. Hum. Evol., vol. 46 (2004), pp. 3-25
  12. Ungar, P. S., Teaford, M. F., R.F. Kay, Molar micowear and shearing crest development in Miocene catarrhines, Anthropologie, vol. 42 (2004), pp. 21-35
  13. Forasiepi, A. Sánchez-Villagra, M. R. Goin, F. J. Madden, R, M. Takai, M. Kay, R .F., A new hathliacynidae (Metatheria, Sparassodonta) from the middle Miocene of Quebrada Honda, Bolivia, Journal of Vertebrate Paleontology (in review)
  14. Kirk, E.C., M. Cartmill, R.F. Kay, and P. Lemelin, Primate origins and carpolestid relationships: not nailed yet. Comment on Block and Boyer, Science, vol. 300 (2003), pp. 471
  15. Jungers, W.L., A.A. Pokempner, R.F. Kay, and M. Cartmill, Hypoglossal canal size in living hominoids and the evolution of human speech, Human Biology, vol. 75 (2003), pp. 473-484
  16. Goin, F.J., M.R. Sánchez-Villagra, R.F. Kay, F. Anaya-Diaz, and M. Takai, New paleothentid marsupial from the middle Miocene of Bolivia, Palaeontolgy, vol. 46 (2003), pp. 307-315
  17. Shigehara, N., M. Takai, R.F. Kay, A.K. Aung, A.N. Soe, S.T. Tun, T. Tsubamto, and T. Thein, The upper dentition and face of Pondaungia cotteri from central Myanmar, J. Hum. Evol., vol. 42 (2002), pp. 143-166
  18. Holroyd, P.A., R.L. Ciochon, G.F. Gunnell, R.F. Kay, M. Takai, and M. Godinot, What's in a name? Family-group name taxonomy of larger-bodied Southeast Asian Eocene Primates, Journal of Human Evolution, vol. 43 (2002), pp. 755-758
  19. Bellosi, E.S., S.E. Miquel, R.F. Kay, and R.H. Madden, Un paleosuelo Mustersense con microgastrópodos terrestres (Charopidae) de la Formación Sarmiento, Eoceno de Patagonia central: significado paleoclimático, Ameghiniana, vol. 39 (2002), pp. 453-464
  20. Williams, S. and R.F. Kay, A Comparative Test of Adaptive Explanations for Hypsodonty in Ungulates and Rodents, Journal of Mammalian Evolution, vol. 8 no. 3 (2001), pp. 207-229
  21. Sánchez-Villagra, M., R.F. Kay, and F. Anaya-Daza, Cranial anatomy and paleobiology of the Miocene marsupial Hondalagus altiplanensis and a phylogeny of argyrolagids, Paleontology, vol. 43 (2000), pp. 287-301
  22. Sánchez-Villagra, M.R., R.J. Burnham, D.C. Campbell, R.M. Feldmann, E.S. Gaffney, R.F. Kay, R. Lozsán, R. Purdy, and J.G.M. Thewissen, A new near-shore marine fauna and flora from the early Neogene of Northwestern Venezuela, Journal of Paleontology, vol. 74 (2000), pp. 957-968
  23. Kay, R.F. and E.C. Kirk, Osteological evidence for the evolution of activity pattern and visual acuity in Primates, American Journal of Physical Anthropology, vol. 113 (2000), pp. 235-262
  24. R.F. Kay, Parapithecidae, in Encyclopedia of Evolution and Prehistory, 2nd Edition, edited by E. Delson, et al. (2000), pp. 545-548, Garland Pub. Co.: New York

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)

Other

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

Journal Articles

  1. Zack, S., R.F. Kay, and R.H. Madden, New notoungulates from the Paleogene at Vilcapujio, Bolivia, J. Vert. Paleont., vol. 19, Suppl to #3 (1999), pp. 86A
  2. Kay, R.F., D.J. Johnson, and D.J. Meldrum, Proteropithecia, new name for Propithecia, Am. J. Primatol., vol. 47 (1999), pp. 347 (1998 non Vojnits 1985.)
  3. Kay, R.F., R.H. Madden, M. Mazzoni, M.G. Vucetich, G. Ré, M. Heizler, and H. Sandeman, The oldest Argentine primates: first age determinations for the Colhuehuapian South American Land Mammal 'Age', Supplement 28, Am. J. Phys. Anthropol. (1999), pp. 166
  4. Carlini, A.A., M.G. Vucetich, M. Mazzoni, A. Zucol, G.H. Ré, J.F.A. Vilas, R.F. Kay, R.H. Madden, and M. Heizler, , Implications of the late Eocene age of the casamayoran fauna at Gran Barranca, Patagonia, J. Vert. Paleont., vol. 19, Suppl to #3 (1999), pp. 35A
  5. Ross, C.F., B.A. Williams, and R.F. Kay, Phylogenetic analysis of anthropoid relationships, J. Hum. Evol., vol. 35 (1998), pp. 221-306
  6. Kay, R.F., M. Cartmill, and M. Balow, The hypoglossal canal and the origins of human vocal behavior, Am. J. Phys. Anthropol., vol. Suppl. 26 (1998), pp. 137
  7. R.F. Kay, A new pitheciin primate from the middle Miocene of Argentina, Am. J. Primatol., vol. 45 (1998), pp. 317-336
  8. Kay, R.F., B.J. MacFadden, R.H. Madden, H. Sandeman, and F. Anaya, Revised age of the Salla beds, Bolivia, and its bearing on the age of the Deseadan South American Land Mammal 'Age', J. Vert. Paleont., vol. 18 (1998), pp. 189-199
  9. Gonzalez, W.G., R.F. Kay, and E.C. Kirk, Optic canal and orbit size --implications for the origins of diurnality and visual acuity in primates, J. Phys. Anthropol., vol. Suppl. 26 (1998), pp. 87
  10. Sánchez-Villagra, M.R. and R.F. Kay, A skull of Proargyrolagus, the oldest argyrolagid (Late Oligocene Salla Beds, Bolivia), with brief comments concerning its paleobiology, J. Vert. Paleont., vol. 17 (1997), pp. 717-724
  11. Meldrum, D.J. and R.F. Kay, Nuciruptor rubricae, a new pitheciin seed predator from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. 102 (1997), pp. 407-427
  12. Kay, R.F. and M.R. Sanchez-Villagra, Skull of Hondalagus, an argyrolagid marsupial from the Middle Miocene of Bolivia, J. Vert. Paleont. (1997)
  13. Kay, R.F., C. Ross, B.A. Williams, and D. Johnson, Cladistic analysis and Anthropoid Origins, reply to Block et al., Science, vol. 278 (1997), pp. 2135-2136
  14. Kay, R.F., C.F. Ross, and B.A. Williams, Anthropoid Origins, Science, vol. 275 (1997), pp. 797-804
  15. Kay, R.F. and R.H. Madden, Mammals and rainfall: paleoecology of the middle Miocene at La Venta (Colombia, South America), J. Hum. Evol., vol. 32 (1997), pp. 161-199
  16. Ungar, P.S., R.F. Kay, M.F. Teaford, and A. Walker, Dental evidence for diets of Miocene apes, Am. J. Phys. Anthropol., vol. Suppl. 22 (1996), pp. 232-233
  17. Teaford, M.F., P.S. Ungar, R.F. Kay, and M.G. Leakey, The evolution of diet in Old World monkeys, Am. J. Phys. Anthropol., vol. Suppl. 22 (1996), pp. 227
  18. Sanchez-Villagra, M.R. and R.F. Kay, Do phalangeriforms (Marsupialia: Diprotodontia) have a “Hypocone”?, Australian Journal of Zoology, vol. 44 (1996), pp. 461-467
  19. Kay, R.F. and D.D. Johnson, New platyrrhines from the middle Miocene of Argentina, Am. J. Phys. Anthropol., vol. Suppl. 22 (1996), pp. 136-167
  20. R.F. Kay, Review of Colobine Monkeys. Their ecology, behavior and evolution by A.G. Davies and J.F. Oates, Science, vol. 271 (1996), pp. 156-157
  21. Williams, B.A. and R.F. Kay, The taxon Anthropoidea and the crown clade concept, Evol. Anthropol., vol. 3 (1995), pp. 188-190
  22. Ungar, P.S. and R.F. Kay, Molar Shear and dietary adaptations of European Miocene catarrhines, Am. J. Phys. Anthropol., vol. Suppl. 20 (1995), pp. 214
  23. Sanchez-Villagra, M.R. and R.F. Kay, A skull of Proargyrolagus, the oldest argyrolagid (Early Miocene) Salla beds, Bolivia, J. Vert. Paleont., vol. 15(Supplement 3) (1995), pp. 51A-52A
  24. 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, J. Vert. Paleont., vol. 15(Suppl. 3) (1995), pp. 38A
  25. Kay, R.F. and B.A. Williams, Recent finds of monkeys from the Oligocene/Miocene of Salla, Bolivia, Am. J. Phys. Anthropol., vol. Suppl. 20 (1995), pp. 124
  26. Kay, R.F. and R.H. Madden, An overview of the paleogeography and paleoecology of the La Venta region, Am. J. Phys. Anthropol., vol. Suppl. 18 (1994), pp. 120
  27. R.F. Kay, "Giant" Tamarin from the Miocene of Colombia, American Journal of Physcial Anthropology, vol. 13 (1994), pp. 34-48
  28. Kay, R.F. and B.A. Williams, Cladistics, computers, and character analysis, Evol. Anthropol., vol. 3 (1994), pp. 32-35
  29. Anthony, M.R.L. and R.F. Kay, Tooth form and diet in ateline and alouattine primates: reflections on the comparative method, Am. J. Sci., vol. 283A (1993), pp. 356-382
  30. Meldrum, D.J., R.F. Kay, and C.H. Chiu, Phylogenetic relationships of Cebus and Saimiri inferred from mitochondrial DNA sequences and dental anatomy, Am. J. Phys. Anthropol., vol. Suppl. 16 (1993), pp. 144-145
  31. Kay, R.F., R.H. Madden, M.G. Vucetich, R.L. Cifelli, M.M. Mazzoni, and C.C.S. III, Vertebrate paleontology in the Eocene of Bolivia and the Deseadan of Argentina, J. Vert. Paleont., vol. 13 no. 3 (1993), pp. 44A
  32. Meldrum, D.J. and R.F. Kay, A new specimen of pitheciine primate from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. 141 (1992), pp. 121
  33. Kay, R.F., J.G.M. Thewissen, and A.D. Yoder, Cranial anatomy of Ignacius graybullianus and the affinities of the Plesiadapiformes, Am. J. Phys. Anthropol., vol. 89 (1992), pp. 477-498
  34. Madden, R.H. and R.F. Kay, The Friasian of Patagonia, J. Vert. Paleont., vol. 11 no. 3 (1991), pp. 44A
  35. Madden, R.H. and R.F. Kay, Tooth form and diet in ateline and alouattine primates: reflections on the comparative method, J. Vert. Paleont., vol. 11 no. 3 (1991), pp. 39A
  36. Kay, R.F., Review of Primate Phylogeny by F.E. Grine, J.G. Fleagle and L.B. Martin, Am. J. Phys. Anthropol., vol. 84 (1991), pp. 109-111
  37. Ford, S.M., L.C. Davis, and R.F. Kay, New platyrrhine astragalus from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. Suppl. 12 (1991), pp. 73-74
  38. Meldrum, D.J. and R.F. Kay, A new partial skeleton of Cebupithecia sarmientoi from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. 81 (1990), pp. 267
  39. Meldrum, D.J., J.G. Fleagle, and R.F. Kay, Partial humeri of two Miocene Colombian primates, Am. J. Phys. Anthropol., vol. 81 (1990), pp. 413-422
  40. Kay, R.F., A possible "giant" tamarin from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. 81 (1990), pp. 248
  41. Kay, R.F., R.W. Thorington, and P. Houde, Eocene plesiadapiform shows affinities with flying lemurs not primates, Nature, vol. 345 (1990), pp. 342-344
  42. Kay, R.F., The phyletic relationships of extant and fossil Pitheciinae (Platyrrhini, Anthropoidea), J. Hum. Evol., vol. 19 (1990), pp. 175-208
  43. Madden, R.H., R.F. Kay, J.F. Lundberg, and G. Scillato-Yane, Vertebrate paleontology, stratigraphy, and biochronology of the Miocene of southern Ecuador, J. Vert. Paleont., vol. 9 no. 3 (1989), pp. 31A
  44. Madden, R.H., R.F. Kay, and J. Guerrero, New Stirtonia victoriae material from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. 78 (1989), pp. 265
  45. Kay, R.F., A new "giant" tamarin from the Miocene of Colombia, Am. J. Phys. Anthropol., vol. 9 no. 3 (1989), pp. 28A
  46. Kay, R.F., A new small platyrrhine from the Miocene of Colombia and the phyletic position of the callitrichines, Am. J. Phys. Anthropol., vol. 78 (1989), pp. 251
  47. Kay, R.F., Review of Primate Adaptation and Evolution by J.G. Fleagle, Quarterly Review of Biology, vol. 64 (1989), pp. 344
  48. Fleagle, J.G. and R.F. Kay, The dental morphology of Dolichocebus gaimanensis, a fossil monkey from Argentina, Am. J. Phys. Anthropol., vol. 78 (1989), pp. 221
  49. Simons, E.L. and R.F. Kay, New material of Qatrania from Egypt with comments on the phylogenetic position of the Parapithecidae (Primates, Anthropoidea), Am. J. Primatol., vol. 15 (1988), pp. 337-347
  50. Plavcan, J.M. and R.F. Kay, Sexual dimorphism and dental variability in platyrrhine primates, International Journal of Primatology, vol. 9 (1988), pp. 169-178
  51. Madden, R.H., R.F. Kay, J.G. Lundberg, R.L. Cifelli, and J. Guerrero, Informe general de nuevos descubrimientos en el Mioceno de Colombia y Chile, V. Journ. Arg. Paleont. Vert. (1988)
  52. Kay, R.F., Phyletic Position of the Pitheciinae, J. Vert. Paleont., vol. 8(suppl. 3) (1988), pp. 19A
  53. Kay, R.F. and J.G.H. Cant, Age assessment using cementum annulus counts and toothwear in a free-ranging population of Macaca mulatta, Am. J. Primatol., vol. 15 (1988), pp. 1-16
  54. Plavcan, J.M., R.F. Kay, and G.H. Albrecht, Sexual dimorphism and dental variability among extant platyrrhines, Am. J. Phys. Anthropol., vol. 72 (1987), pp. 243
  55. Kay, R.F., J.M. Plavcan, P.C. Wright, and K.E. Glander, Behavioral and size correlates of canine dimorphism in platyrrhine primates, Am. J. Phys. Anthropol., vol. 72 (1987), pp. 218
  56. Kay, R.F., J.M. Plavcan, K.E. Glander, and P. Wright, Sexual selection and canine dimorphism in New World monkeys, Am. J. Phys. Anthropol., vol. 77 (1987), pp. 385-397
  57. Kay, R.F., R.H. Madden, J.M. Plavcan, R.L. Cifelli, and J. Guerrero-Diaz,, Stirtonia victoriae, a new species of Miocene Colombian primate, J. Hum. Evol., vol. 16 (1987), pp. 173-196
  58. Lundberg, J.G., A. Machado-Allison, and R.F. Kay, Miocene characid fishes from Colombia: evolutionary stasis and extirpation, Science, vol. 234 (1986), pp. 208-209
  59. Kay, R.F., Review of A Complete Guide to the Monkeys, Apes and Other Primates by M. Kavanagh, Quarterly Review of Biology, vol. 60 (1985), pp. 231
  60. Kay, R.F., Dental evidence for the diet of Australopithecus, Ann. Rev. Anthropol., vol. 14 (1985), pp. 315-342
  61. Albrecht, G.H. and R.F. Kay, Portable microcomputers, electronic digital calipers, and the collection of morphometric data, Am. J. Phys. Anthropol., vol. 63 (1984), pp. 133-134
  62. Simons, E.L. and R.F. Kay, Qatrania, A new basal anthropoid primate from the Fayum, Oligocene of Egypt, Nature, vol. 304 (1983), pp. 624-626
  63. Kay, R.F., Ramampithecus reclaimed, The Sciences, vol. 23 no. 1 (1983), pp. 26-27
  64. Kay, R.F. and E.L. Simons, Dental formulae and dental eruption patterns in Parapithecidae (Primates, Anthropoidea), Am. J. Phys. Anthropol., vol. 62 (1983), pp. 363-375
  65. Sheine, W. and R.F. Kay, A model for comparison of masticatory effectiveness in primates, J. Morph., vol. 172 (1982), pp. 139-149
  66. Kay, R.F., M. Cartmill, and R.D.E. MacPhee, Habitus and heritage in archaic primates (Plesiadapiformes), Int. J. Primatol., vol. 3 (1982), pp. 302
  67. Kay, R.F. and H.H. Covert, Species number determination and specimen allocation in fossil samples, Am. J. Phys. Anthropol., vol. 57 (1982), pp. 201
  68. Kay, R.F., The ontogeny of premolar dental wear in Cercocebus albigena (Cercopithecidae), Am. J. Phys. Anthropol., vol. 54 (1981), pp. 153-155
  69. Kay, R.F., The nut-crackers: A new theory of the adaptations of the Ramapithecinae, Am. J. Phys. Anthropol., vol. 55 (1981), pp. 141-151
  70. Simons, E.L., R.F. Kay, and J.G. Fleagle, Recently recovered Oligocene apes from Egypt, Am. J. Phys. Anthropol., vol. 52 (1980), pp. 279
  71. Simons, E.L. and R.F. Kay, Dawn Ape provides clue to social life, Geotimes, vol. 25 (1980), pp. 18
  72. R.F. Kay, The adaptative significance of enamel thickness with implications for hominoid origins, Am. J. Phys. Anthropol., vol. 52 (1980), pp. 243
  73. Kay, R.F., Documenting our antecedents--A review of F. Szalay and E. Delson's book: Evolutionary History of the Primates, Paleobiol., vol. 6 (1980), pp. 517-520
  74. Kay, R.F. and E.L. Simons, The ecology of Oligocene African Anthropoidea, Int. J. Primatol., vol. 1 (1980), pp. 21-37
  75. Kay, R.F. and E.L. Simons, Ecology of Oligocene African Anthropoidea, Int. J. Primatol., vol. 1 (1980), pp. 21-37
  76. Kay, R.F. and E.L. Simons, Ecology of Oligocene African Anthropoidea, American Journal of Physical Anthroplogy, vol. 50 (1979), pp. 453
  77. Kay, R.F., Analysis of species specific molar adaptations in strepsirhine primates--- review of D. Seligsohn's book, American Anthropologist, vol. 81 (1979), pp. 970-971
  78. Kay, R.F. and W.S. Sheine, On the relationship between chitin particle size and digestibility in the primate Galago senegalensis, Am. J. Phys. Anthropol., vol. 50 (1979), pp. 301-308
  79. Kay, R.F. and W.S. Sheine, A model for the comparison of mastication efficiency in primates, Am. J. Phys. Anthropol., vol. 48 (1978), pp. 110-111
  80. Kay, R.F., R. Sussman, and I. Tattersall, Dietary and dental variations in the genus Lemur, with comments concerning general dietary dental correlations of Malagasy strepsirhines, Am. J. Phys. Anthropol., vol. 49 (1978), pp. 119-128
  81. Sheine, W.S. and R.F. Kay, An analysis of chewed food particle size and its relationship to molar structure in the primates Cheirogaleus medius and Galago senegalensis, and the insectivoran Tupaia glis, Am. J. Phys. Anthropol., vol. 47 (1977), pp. 15-20
  82. Kay, R.F., Post-Oligocene evolution of catarrhine diets, Am. J. Phys. Anthropol., vol. 47 (1977), pp. 141-142
  83. Kay, R.F. and M. Cartmill, Cranial morphology and adaptations of Palaechthon nacimienti and other Paromomyidae (Plesiadapoidea, ?Primates), with a description of a new genus and species, J. Hum. Evol., vol. 6 (1977), pp. 19-54
  84. Kay, R.F., The evolution of molar occlusion in Cercopithecidae and early catarrhines, Am. J. Phys. Anthropol., vol. 46 (1977), pp. 327-352
  85. Kay, R.F., Diets of early Miocene African hominoids, Nature, vol. 268 (1977), pp. 628-630
  86. Kay, R.F., Evolution of molar function in catarrhines, Am. J. Phys. Anthropol., vol. 44 (1976), pp. 190
  87. Kay, R.F., Prosimian Biology, a review, American Scientist (1976(Jan-Feb).)
  88. Kay, R.F., The functional adaptions of primate molar teeth, Am. J. Phys. Anthropol., vol. 43 (1975), pp. 195-216
  89. Kay, R.F. and M. Cartmill, Skull of Palaechthon nacimienti, Nature, vol. 252 (1974), pp. 37-38

Papers Presented/Symposia/Abstracts

  1. Perry J.M.G., Kay R.F., Colbert M.W., Tooth root size and chewing muscle leverage in Homunculus, a Miocene Primate from Patagonia, Journal of Vertebrate Paleontology, vol. 26 (2007), pp. 110A
  2. 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 (2007), pp. 135A
  3. Fleagle, J. G., R.F. Kay, A new humerus of Homunculus from the Santa Cruz Formation, (early-middle Miocene, Patagonia)., Journal of Vertebrate Paleontology, vol. 26 (2007), pp. 62A
  4. Kay R.F., Kirk E.C., Malinzak M., Colbert M.W., 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 (2007), pp. 83A-84A
  5. Mitchell, T.R.T., Schmitt, D.,Kay, R.F., The role of binocular vision in primate locomotion, American Journal of Physical Anthropology, vol. Suppl. 41 (2006), pp. 132-133
  6. Kay, R.F., Rae, T.C., Koppe, T.,Colbert, M.W., Paranasal pneumatization in the early Miocene platyrrhine Homunculus patagonicus, American Journal of Physical Anthropology, vol. Supplement 41 (2006), pp. 112
  7. Kay, R.F.,Takai, M., Pitheciidae and other platyrrhine seed predators: the dual occupation of the seed predator niche during platyrrhine evolution, Abstracts volume, XXI Congress of the International Primatological Society, Entebe Uganda (2006)
  8. Vizcano, S.F., M.S. Bargo, A.A. Tauber, and R.F. Kay, The armadillos (Mammalia, Xenarthra) of the Santa Cruz Formation (Early-Middle Miocene) An approach to their paleobiology (2004), Ameghiniana
  9. 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
  10. Tauber, A.A., S.F. Vizcano, R.F. Kay, M.S. Bargo, and C. Luna, Aspectos bioestratigráficos y paleoecológicos de la Formación Santa Cruz (Mioceno temprano-medio) de Patagonia, Argentina (2004), Ameghiniana
  11. 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)
  12. 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)
  13. 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)
  14. 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
  15. Vucetich, G. Carlini, A. Madden, R, M. Vucetich, G. Carlini, A. Madden, R, M. Kay, R .F., New discoveries among the oldest rodents in South America: how old and how primitive?, Journal of Vertebrate Paleontology, vol. 24, suppl to #3 (2004), pp. 125A
  16. 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
  17. Vizcaino, S. F. Bargo, M. S. Tauber, A. A. Kay, R .F., Myrmecophagidae (Mammalia, Xenarthra) de edad Santacrucense (Mioceno temprano-medio)., Ameghiniana (2004)
  18. Tauber, A. A. Kay, R .F. Luna, C. Palacoos, M. E., Aspectos paleoambientales de la Formacion Santa Cruz (Mioeno temprano-medio) en Killik Aike Norte, Patagonia, Argentina, Asociacion Paleontologica Argentina, Reunin Anual de Communicaciones Carlini, A. Madden, R, M. Kay, R .F. Vieytes, E. C. (2004), pp. 26
  19. 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)
  20. 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
  21. Madden, R., M., A. Carlini, M.G. Vucetich, R. Kay, F., M. Heizler, F. Vilas, G. Re, M.J. Kohn, A. Zucol, and E.S. Bellosi, Gran Barranca: the most complete South American middle Cenozoic sequence, in Symposium on the Paleogene, Symposium on the Paleogene, Belgium (25-28 August. 2003)
  22. Madden, R., M., A. Carlini, G. Vucetich, R. Kay, F., M. Heizler, F. Vilas, G. Re, M.J. Kohn, A. Zucol, and E.S. Bellosi, The terrestrial Eocene-Oligocene transition at Gran Barranca in Patagonia, Symposium on the Paleogene, Belgium (25-28 August. 2003)
  23. Kay, R.F. and T.R.T. Mitchell, Cranial evidence for the timing of the catarrhine-platyrrhine divergence, Suppl. 35, Am. J. Phys. Anthropol. (2003), pp. 127
  24. Kirk, E.C., R.F. Kay, and W.L. Jungers, Activity patterns of subfossil lemurs: evidence based on the relative size of the optic canal, Supplement 34, Am. J. Phys. Anthropol., vol. 96 (2002)
  25. Kay, R.F., D. Schmitt, and C. Vinyard, Pondaungia cotteri, a slow moving primate seed predator from the Eocene of South Asia, Supplement 34 (2002), pp. 92-93
  26. Kay, R.F., R.H. Madden, A.A. Carlini, E.S. Bellosi, M. Heizler, G. Ré, F. Vilas, and M.G. Vucetich, The Mustersan interval at Gran Barranca, supplement, Ameghiniana, vol. 38 no. 4 (2001), pp. 34
  27. Kay, R.F., R.H. Madden, E.S. Bellosi, A.A. Carlini, M. Heizler, G. Ré, F. Vilas, and M.G. Vucetich, Puesto Almendra- Colhue-Huapi contact at Gan Barraca, Sarmiento Formation, Chubut, Argentina, supplement, Ameghiniana, vol. 38 no. 4 (2001), pp. 35