A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.

A new notosuchian crocodyliform from the Late Cretaceous Bauru Group found in the southeastern State of São Paulo (Brazil) is described here. The new taxon, Caipirasuchus stenognathus, is referred as a new species of the recently erected genus Caipirasuchus within the clade Sphagesauridae based on a...

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Autores principales:	Diego Pol, Paulo M Nascimento, Alberto B Carvalho, Claudio Riccomini, Ricardo A Pires-Domingues, Hussam Zaher
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/62546fcc16da41aeb7127ec0007e8d2f
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spelling	oai:doaj.org-article:62546fcc16da41aeb7127ec0007e8d2f2021-11-18T08:25:20ZA new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.1932-620310.1371/journal.pone.0093105https://doaj.org/article/62546fcc16da41aeb7127ec0007e8d2f2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24695105/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203A new notosuchian crocodyliform from the Late Cretaceous Bauru Group found in the southeastern State of São Paulo (Brazil) is described here. The new taxon, Caipirasuchus stenognathus, is referred as a new species of the recently erected genus Caipirasuchus within the clade Sphagesauridae based on a phylogenetic analysis of basal mesoeucrocodylians. Caipirasuchus stenognathus is represented by an almost complete skull and lower jaw that has autapomorphic characters that distinguish it from other species of Sphagesauridae. These autapomorphies include: maxilla forming part of the orbital margin (absence of lacrimal-jugal contact), nasal with smooth depressions on the posterior region close to the contact with the maxilla and lacrimal, postorbital with posterior palpebral facet that extends posteriorly underneath the ear-flap groove, and a distinct anterior process of the medial flange of the retroarticular process. Additionally, the new taxon lacks autapomorphic features described in other sphagesaurids. The phylogenetic analysis results in a monophyletic genus Caipirasuchus, that is the sister group of a clade fomed by Sphagesaurus huenei, Caryonosuchus pricei, and Armadillosuchus arrudai. Sphagesaurids also include a basal clade formed by Adamantinasuchus navae and Yacarerani boliviensis. Other notosuchian taxa, such as Mariliasuchus amarali, Labidiosuchus amicum, Notosuchus terrestris, and Morrinhosuchus luziae are successive sister taxa of Sphagesauridae, forming a clade of advanced notosuchians that are restricted to the Late Cretaceous of South America. These results contrast with most previous phylogenetic hypotheses of the group that depicted some members of Sphagesauridae as more closely related to baurusuchids, or found Asian (e.g., Chimaerasuchus) or African (Malawisuchus, Pakasuchus) forms nested within advanced notosuchians that are, according to our analysis, endemic of the Late Cretaceous of South America.Diego PolPaulo M NascimentoAlberto B CarvalhoClaudio RiccominiRicardo A Pires-DominguesHussam ZaherPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 4, p e93105 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Diego Pol Paulo M Nascimento Alberto B Carvalho Claudio Riccomini Ricardo A Pires-Domingues Hussam Zaher A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.
description	A new notosuchian crocodyliform from the Late Cretaceous Bauru Group found in the southeastern State of São Paulo (Brazil) is described here. The new taxon, Caipirasuchus stenognathus, is referred as a new species of the recently erected genus Caipirasuchus within the clade Sphagesauridae based on a phylogenetic analysis of basal mesoeucrocodylians. Caipirasuchus stenognathus is represented by an almost complete skull and lower jaw that has autapomorphic characters that distinguish it from other species of Sphagesauridae. These autapomorphies include: maxilla forming part of the orbital margin (absence of lacrimal-jugal contact), nasal with smooth depressions on the posterior region close to the contact with the maxilla and lacrimal, postorbital with posterior palpebral facet that extends posteriorly underneath the ear-flap groove, and a distinct anterior process of the medial flange of the retroarticular process. Additionally, the new taxon lacks autapomorphic features described in other sphagesaurids. The phylogenetic analysis results in a monophyletic genus Caipirasuchus, that is the sister group of a clade fomed by Sphagesaurus huenei, Caryonosuchus pricei, and Armadillosuchus arrudai. Sphagesaurids also include a basal clade formed by Adamantinasuchus navae and Yacarerani boliviensis. Other notosuchian taxa, such as Mariliasuchus amarali, Labidiosuchus amicum, Notosuchus terrestris, and Morrinhosuchus luziae are successive sister taxa of Sphagesauridae, forming a clade of advanced notosuchians that are restricted to the Late Cretaceous of South America. These results contrast with most previous phylogenetic hypotheses of the group that depicted some members of Sphagesauridae as more closely related to baurusuchids, or found Asian (e.g., Chimaerasuchus) or African (Malawisuchus, Pakasuchus) forms nested within advanced notosuchians that are, according to our analysis, endemic of the Late Cretaceous of South America.
format	article
author	Diego Pol Paulo M Nascimento Alberto B Carvalho Claudio Riccomini Ricardo A Pires-Domingues Hussam Zaher
author_facet	Diego Pol Paulo M Nascimento Alberto B Carvalho Claudio Riccomini Ricardo A Pires-Domingues Hussam Zaher
author_sort	Diego Pol
title	A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.
title_short	A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.
title_full	A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.
title_fullStr	A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.
title_full_unstemmed	A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.
title_sort	new notosuchian from the late cretaceous of brazil and the phylogeny of advanced notosuchians.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/62546fcc16da41aeb7127ec0007e8d2f
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A new notosuchian from the Late Cretaceous of Brazil and the phylogeny of advanced notosuchians.

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