Publications [#229067] of Daniel W. McShea

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Papers Published

  1. McShea, DW, PERSPECTIVE METAZOAN COMPLEXITY AND EVOLUTION: IS THERE A TREND?, Evolution; International Journal of Organic Evolution, vol. 50 no. 2 (April, 1996), pp. 477-492 [doi] .
    (last updated on 2019/05/19)

    The notion that complexity increases in evolution is widely accepted, but the best-known evidence is highly impressionistic. Here I propose a scheme for understanding complexity that provides a conceptual basis for objective measurement. The scheme also shows complexity to be a broad term covering four independent types. For each type, I describe some of the measures that have been devised and review the evidence for trends in the maximum and mean. In metazoans as a whole, there is good evidence only for an early-Phanerozoic trend, and only in one type of complexity. For each of the other types, some trends have been documented, but only in a small number of metazoan subgroups.