Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)

New World monkeys (order Primates) are an example of a major mammalian evolutionary radiation in the Americas, with a contentious fossil record. There is evidence of an early platyrrhine occupation of this continent by the EoceneeOligocene transition, evolving in isolation from the Old World primate...

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Autores principales:	Rocatti, Guido, Arístide, Leandro, Rosenberger, Alfred L., Pérez, Sergio Iván
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Naturales Antropología Paleontology Neontology Phenotypic evolution Mandible Fossils Neotropical
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/106002 https://www.sciencedirect.com/science/article/abs/pii/S0047248417303500
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-106002
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Antropología Paleontology Neontology Phenotypic evolution Mandible Fossils Neotropical
spellingShingle	Ciencias Naturales Antropología Paleontology Neontology Phenotypic evolution Mandible Fossils Neotropical Rocatti, Guido Arístide, Leandro Rosenberger, Alfred L. Pérez, Sergio Iván Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)
topic_facet	Ciencias Naturales Antropología Paleontology Neontology Phenotypic evolution Mandible Fossils Neotropical
description	New World monkeys (order Primates) are an example of a major mammalian evolutionary radiation in the Americas, with a contentious fossil record. There is evidence of an early platyrrhine occupation of this continent by the EoceneeOligocene transition, evolving in isolation from the Old World primates from then on, and developing extensive morphological and size variation. Previous studies postulated that the platyrrhine clade arose as a local version of the Simpsonian ecospace model, with an early phase involving a rapid increase in morphological and ecological diversity driven by selection and ecological opportunity, followed by a diversification rate that slowed due to niche-filling. Under this model, variation in extant platyrrhines, in particular anatomical complexes, may resemble patterns seen among middleelate Miocene (10e14 Ma) platyrrhines as a result of evolutionary stasis. Here we examine the mandible in this regard, which may be informative about the dietary and phylogenetic history of the New World monkeys. Specifically, we test the hypothesis that the Simpsonian ecospace model applies to the platyrrhine mandible through a geometric morphometric analysis of digital images of the jaws of extant and extinct species, and we compare these results to those obtained using a phylogenetic comparative approach based on extant species. The results show a marked phylogenetic structure in the mandibular morphology of platyrrhines. Principal component analyses highlight the morphological diversity among modern forms, and reveal a similar range of variation for the clade when fossil specimens are included. Disparity-Through-Time analysis shows that most of the shape variation between platyrrhines originated early in their evolution (between 20 and 15 Ma). Our results converge with previous studies of body mass, cranial shape, the brain and the basicranium to show that platyrrhine evolution might have been shaped by an early increase in morphological variation followed by a decelerated rate of diversification and evolutionary stasis.
format	Articulo Articulo
author	Rocatti, Guido Arístide, Leandro Rosenberger, Alfred L. Pérez, Sergio Iván
author_facet	Rocatti, Guido Arístide, Leandro Rosenberger, Alfred L. Pérez, Sergio Iván
author_sort	Rocatti, Guido
title	Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)
title_short	Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)
title_full	Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)
title_fullStr	Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)
title_full_unstemmed	Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)
title_sort	early evolutionary diversification of mandible morphology in the new world monkeys (primate, platyrrhini)
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/106002 https://www.sciencedirect.com/science/article/abs/pii/S0047248417303500
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bdutipo_str	Repositorios
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Early evolutionary diversification of mandible morphology in the New World monkeys (Primate, Platyrrhini)

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