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Evolution of human–ape relationships remains open for investigation

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Abstract

We demonstrate that much of the morphological and metrical data Lehtonen et¬†al. (Journal of Biogeography, 2011, 38, 805–808) present in support of a closer relationship between humans and chimpanzees than between humans and orangutans are faulty. When the numerous invalid features and suggested character states are excluded, as they should be, the most robust theory of relationship that can be generated is between humans and orangutans. With regard to the direct optimization method (DOM) resolving problems in analysing molecular (sequence) data, the method, if valid, requires that demonstration of sequence similarity is per force a demonstration of synapomorphy. In brief, DOM fails both to test theories of relatedness and to take into account the fact that identification of shared similarity does not translate into demonstration of synapomorphy.
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Document Type: Correspondence

Affiliations: 1: Buffalo Museum of Science, 1020 Humboldt Parkway, Buffalo, NY 14211-1293, USA 2: Departments of Anthropology, and History and Philosophy of Science, University of Pittsburgh, Pittsburgh, PA 15260, USA

Publication date: 2011-12-01

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