| Texto completo | |
| Autor(es): |
Godoy, Pedro L.
[1]
;
Cidade, Giovanne M.
[2, 3]
;
Montefeltro, Felipe C.
[4]
;
Langer, Max C.
[2]
;
Norell, Mark A.
[5]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] SUNY Stony Brook, Dept Anat Sci, Stony Brook, NY 11794 - USA
[2] Univ Sao Paulo, Lab Paleontol Ribeirao Preto, FFCLRP, Ribeirao Preto - Brazil
[3] Univ Fed Sao Carlos, Dept Biol, Lab Estudos Paleobiol, Sorocaba - Brazil
[4] Univ Estadual Paulista, Dept Biol & Zootecnia, FEIS, Ilha Solteira - Brazil
[5] Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 - USA
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PAPERS IN PALAEONTOLOGY; v. 7, n. 3, p. 1205-1231, AUG 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Caimaninae is one of the few crocodylian lineages that still has living representatives. Today, most of its six extant species are restricted to South and Central America. However, recent discoveries have revealed a more complex evolutionary history, with a fossil record richer than previously thought and a possible North American origin. Among the oldest caimanines is Eocaiman cavernensis, from the Eocene of Patagonia, Argentina. It was described by George G. Simpson in the 1930s, representing the first caimanine reported for the Palaeogene. Since then, E. cavernensis has been ubiquitous in phylogenetic studies on the group, but a more detailed morphological description and revision of the taxon were lacking. Here, we present a reassessment of E. cavernensis, based on first-hand examination and micro-computed tomography of the holotype, and reinterpret different aspects of its morphology. We explore the phylogenetic affinities of E. cavernensis and other caimanines using parsimony and Bayesian inference approaches. Our results provide evidence for a monophyletic Eocaiman genus within Caimaninae, even though some highly incomplete taxa (including the congeneric Eocaiman itaboraiensis) represent significant sources of phylogenetic instability. We also found Culebrasuchus mesoamericanus as sister to all other caimanines and the North American globidontans (i.e. Brachychampsa and closer relatives) outside Caimaninae. A time-calibrated tree, obtained using a fossilized birth-death model, shows a possible Campanian origin for the group (76.97 +/- 6.7 Ma), which is older than the age estimated using molecular data, and suggests that the earliest cladogenetic events of caimanines took place rapidly and across the K-Pg boundary. (AU) | |
| Processo FAPESP: | 11/16007-9 - Revisão da alfa-taxonomia dos Baurusuchidae (Crocodyliformes, Mesoeucrocodylia) da formação Vale do Rio do Peixe (Grupo Bauru, Cretáceo Superior), com a descrição de um novo espécime da região de General Salgado-SP |
| Beneficiário: | Pedro Lorena Godoy |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 13/06811-0 - Primeiro registro de conteúdos abdominais em Crocodyliformes fósseis e suas implicações paleoecológicas e biológicas |
| Beneficiário: | Pedro Lorena Godoy |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Mestrado |
| Processo FAPESP: | 13/04516-1 - Revisão Sistemática do gênero Mourasuchus (Alligatoroidea, Caimaninae), um dos crocodilos mais peculiares do mundo |
| Beneficiário: | Giovanne Mendes Cidade |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |