The evolution of the platyrrhine talus

A comparative analysis of the phenetic affinities of the Miocene platyrrhines with their modern relatives

Dados Bibliográficos

ID5709173
AutoresThomas A Püschel (0000-0002-2231-2297, University of Manchester, autor correspondente), Justin T Gladman (0000-0002-7946-7775, The Graduate Center, CUNY), R Bobe (0000-0001-9059-2203, University of Oxford), William I Sellers (0000-0002-2913-5406, University of Manchester)
Ano2017
Volume111
Páginas179-201
Data de publicação2017-10-01
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoJournal of Human Evolution (JOURNAL)
Identificadores do periódicoISSN: 0047-2484 • E-ISSN: 1095-8606
EditoraElsevier BV (PUBLISHER)
DOI10.1016/j.jhevol.2017.07.015
PMID28874270
OpenAlexW2739537469
IdiomaEN
Citações recebidas5
Referências citadas128

Platyrrhines are a diverse group of primates that presently occupy a broad range of tropical-equatorial environments in the Americas. However, most of the fossil platyrrhine species of the early Miocene have been found at middle and high latitudes. Although the fossil record of New World monkeys has improved considerably over the past several years, it is still difficult to trace the origin of major modern clades. One of the most commonly preserved anatomical structures of early platyrrhines is the talus. This work provides an analysis of the phenetic affinities of extant platyrrhine tali and their Miocene counterparts through geometric morphometrics and a series of phylogenetic comparative analyses. Geometric morphometrics was used to quantify talar shape affinities, while locomotor mode percentages (LMPs) were used to test if talar shape is associated with locomotion. Comparative analyses were used to test if there was convergence in talar morphology, as well as different models that could explain the evolution of talar shape and size in platyrrhines. Body mass predictions for the fossil sample were also computed using the available articular surfaces. The results showed that most analyzed fossils exhibit a generalized morphology that is similar to some 'generalist' modern species. It was found that talar shape covaries with LMPs, thus allowing the inference of locomotion from talar morphology. The results further suggest that talar shape diversification can be explained by invoking a model of shifts in adaptive peak to three optima representing a phylogenetic hypothesis in which each platyrrhine family occupied a separate adaptive peak. The analyses indicate that platyrrhine talar centroid size diversification was characterized by an early differentiation related to a multidimensional niche model. Finally, the ancestral platyrrhine condition was reconstructed as a medium-sized, generalized, arboreal, quadruped

Affinities · Biology · Evolutionary biology · Evolution and Paleontology Studies · Paleontology · Primate Behavior and Ecology · Wildlife Ecology and Conservation