Download Anthropoid Origins: New Visions by Callum F. Ross, Richard F. Kay PDF

By Callum F. Ross, Richard F. Kay

This moment variation could be an edited quantity of curiosity to people who do study and educate concerning the evolution of primates. It goals to show to primatologists, anthropologists, palaeontologists, and neuroscientists the latest reports of primate phylogeny, the anthropoid fossil checklist, the evolution of the primate visible procedure, and the beginning of the anthropoid social platforms. This name incorporates a CD-ROM and colour figures.

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Simpson (1944) reconciled observations of apparent orthogenetic phenomena with the rnicroevolutionary mechanisms of population genetics, enabling Le Gros Clark to continue to Evolving Perspectives on Anthropoidea 13 interpret primate evolution in terms of trends, but with the driving force behind these trends being natural selection rather than orthogenesis. However, Le Gros Clark continued to view anthropoid origins and evolution as the expression of pervasive primate trends and he never specified what selective forces might account for the divergence of anthropoids from other primates.

Members of some of these radiations survived until the present, yielding a series of grades of living primates, paralleling the series of fossil forms. Anthropoids were central to Le Gros Clark's scheme. Whereas some of the trends defining the primate order are not found in lemurs, all are present in anthropoids. This is revealed by a comparison of the trends in the skull that he claims define the order as a whole, progressive reduction of the facial part ofthe skull, with recession of the snout region and restriction of the nasal cavities-expansion of the neurocraniumforward rotation of the orbital apertures-eompletion of a postorbital barparticipation of the ethmoid in the medial wall of the orbit (except in the Lemuriformes )--displacement of the foramen magnum towards the base of the skull-formation of an osseous floor of the tympanic cavityfrom a process of the petrosal bone (Le Gras Clark, 1934, pp.

C) How do Asian Eocene taxa (Eosimiidae and Amphipithecidae) relate to Anthropoidea? (d) How do Eocene and Oligocene anthropoids of Africa (Parapithecidae, Propliopithecidae, Oligopithecidae) relate to the Platyrrhini and Catarrhini? Is Anthropoidea a Monophyletic Group, and What are its Synapomorphic Features? Evolutionary Biology of the New World Monkeys and Continental Drift (Ciochon and Chiarelli, 1980), the first volume dedicated to the study of anthropoid origins, documents the demise of the anthropoid polyphyly 16 Callum F.

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