Abstract
The ateline monkeys constitute as certain a monophyletic group as there is among primates. The group is intriguing because while their adaptations are well-documented and their monophyly as a group is unquestioned, their phylogenetic interrelationships are controversial. Molecular data indicate a phylogeny at odds with their morphology. Traditional morphological comparisons isolate Alouatta from the atelins, and link Ateles and Brachyteles as a sister group to the exclusion of Lagothrix. In contrast, several recent molecular studies point to a closer relationship between Brachyteles and Lagothrix than between Brachyteles and Ateles. At the heart of the problem lie the assumptions we make about the validity of data and the homology of observed traits. The fossil record further confounds the issue. We must account for the fossil record because it is positive evidence. But we cannot control how much of it there is or how much of it ever will be known. At this point in time, the ateline molecular and fossil record provoke us to examine critically our morphological approach to phylogenetic modeling.
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Hartwig, W. Implications of Molecular and Morphological Data for Understanding Ateline Phylogeny. Int J Primatol 26, 999–1015 (2005). https://doi.org/10.1007/s10764-005-6455-4
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DOI: https://doi.org/10.1007/s10764-005-6455-4