Tags

Type your tag names separated by a space and hit enter

An exceptional fossil skull from South America and the origins of the archosauriform radiation.
Sci Rep. 2016 Mar 11; 6:22817.SR

Abstract

Birds, dinosaurs, crocodilians, pterosaurs and their close relatives form the highly diverse clade Archosauriformes. Archosauriforms have a deep evolutionary history, originating in the late Permian, prior to the end-Permian mass extinction, and radiating in the Triassic to dominate Mesozoic ecosystems. However, the origins of this clade and its extraordinarily successful body plan remain obscure. Here, we describe an exceptionally preserved fossil skull from the Lower Triassic of Brazil, representing a new species, Teyujagua paradoxa, transitional in morphology between archosauriforms and more primitive reptiles. This skull reveals for the first time the mosaic assembly of key features of the archosauriform skull, including the antorbital and mandibular fenestrae, serrated teeth, and closed lower temporal bar. Phylogenetic analysis recovers Teyujagua as the sister taxon to Archosauriformes, and is congruent with a two-phase model of early archosauriform evolution, in response to two mass extinctions occurring at the end of the Guadalupian and the Permian.

Authors+Show Affiliations

Laboratório de Paleobiologia, Universidade Federal do Pampa, São Gabriel, Brazil.Laboratório de Paleontologia e Evolução de Petrolina, Universidade Federal do Vale do São Francisco, Petrolina, Brazil.Laboratório de Paleontologia de Vertebrados, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.School of Geography, Earth &Environmental Sciences, University of Birmingham, Birmingham, UK.Laboratório de Paleontologia de Vertebrados, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26965521

Citation

Pinheiro, Felipe L., et al. "An Exceptional Fossil Skull From South America and the Origins of the Archosauriform Radiation." Scientific Reports, vol. 6, 2016, p. 22817.
Pinheiro FL, França MA, Lacerda MB, et al. An exceptional fossil skull from South America and the origins of the archosauriform radiation. Sci Rep. 2016;6:22817.
Pinheiro, F. L., França, M. A., Lacerda, M. B., Butler, R. J., & Schultz, C. L. (2016). An exceptional fossil skull from South America and the origins of the archosauriform radiation. Scientific Reports, 6, 22817. https://doi.org/10.1038/srep22817
Pinheiro FL, et al. An Exceptional Fossil Skull From South America and the Origins of the Archosauriform Radiation. Sci Rep. 2016 Mar 11;6:22817. PubMed PMID: 26965521.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An exceptional fossil skull from South America and the origins of the archosauriform radiation. AU - Pinheiro,Felipe L, AU - França,Marco A G, AU - Lacerda,Marcel B, AU - Butler,Richard J, AU - Schultz,Cesar L, Y1 - 2016/03/11/ PY - 2015/12/18/received PY - 2016/02/22/accepted PY - 2016/3/12/entrez PY - 2016/3/12/pubmed PY - 2017/3/10/medline SP - 22817 EP - 22817 JF - Scientific reports JO - Sci Rep VL - 6 N2 - Birds, dinosaurs, crocodilians, pterosaurs and their close relatives form the highly diverse clade Archosauriformes. Archosauriforms have a deep evolutionary history, originating in the late Permian, prior to the end-Permian mass extinction, and radiating in the Triassic to dominate Mesozoic ecosystems. However, the origins of this clade and its extraordinarily successful body plan remain obscure. Here, we describe an exceptionally preserved fossil skull from the Lower Triassic of Brazil, representing a new species, Teyujagua paradoxa, transitional in morphology between archosauriforms and more primitive reptiles. This skull reveals for the first time the mosaic assembly of key features of the archosauriform skull, including the antorbital and mandibular fenestrae, serrated teeth, and closed lower temporal bar. Phylogenetic analysis recovers Teyujagua as the sister taxon to Archosauriformes, and is congruent with a two-phase model of early archosauriform evolution, in response to two mass extinctions occurring at the end of the Guadalupian and the Permian. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/26965521/An_exceptional_fossil_skull_from_South_America_and_the_origins_of_the_archosauriform_radiation_ L2 - https://doi.org/10.1038/srep22817 DB - PRIME DP - Unbound Medicine ER -