A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.

A new crocodyliform, Sahitisuchus fluminensis gen. et sp. nov., is described based on a complete skull, lower jaw and anterior cervical vertebrae collected in the São José de Itaboraí Basin of Rio de Janeiro, Brazil. The specimen is one of the best preserved crocodyliforms from Paleocene deposits re...

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Autores principales:	Alexander W A Kellner, André E P Pinheiro, Diogenes A Campos
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7022ff5bbd3d41ee9341fcedc6c77607
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spelling	oai:doaj.org-article:7022ff5bbd3d41ee9341fcedc6c776072021-11-18T08:37:48ZA new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.1932-620310.1371/journal.pone.0081386https://doaj.org/article/7022ff5bbd3d41ee9341fcedc6c776072014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24454686/?tool=EBIhttps://doaj.org/toc/1932-6203A new crocodyliform, Sahitisuchus fluminensis gen. et sp. nov., is described based on a complete skull, lower jaw and anterior cervical vertebrae collected in the São José de Itaboraí Basin of Rio de Janeiro, Brazil. The specimen is one of the best preserved crocodyliforms from Paleocene deposits recovered so far and represents a sebecosuchian, one of the few clades that survived the Cretaceous-Paleogene biotic crisis. The new taxon is found in the same deposit as an alligatoroid, a group that experienced large diversification in the Paleogene. The sebecosuchian record suggests that after the Cretaceous-Paleogene biotic crisis, the less specialized members of this clade characterized by a higher number of teeth compared to the baurusuchid sebecosuchians survived, some having terrestrial habits while others developed a semi-aquatic life style (e.g., Lorosuchus). Starting in the Eocene, sebecid sebecosuchians became specialized with a more accentuated oreinirostry as observed in Sebecus and in Langstonia, but not showing the typical reduced dentition developed by the Cretaceous baurusuchid sebecosuchians. The basal position of Barinasuchus arveloi, a high-snouted Miocene sebecid, indicates the occurrence of an independent lineage sometime after the K-Pg biotic crisis that developed accentuated oreinirostry, suggesting a more complex history of the post-K-Pg crocodyliform radiation.Alexander W A KellnerAndré E P PinheiroDiogenes A CamposPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e81386 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexander W A Kellner André E P Pinheiro Diogenes A Campos A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.
description	A new crocodyliform, Sahitisuchus fluminensis gen. et sp. nov., is described based on a complete skull, lower jaw and anterior cervical vertebrae collected in the São José de Itaboraí Basin of Rio de Janeiro, Brazil. The specimen is one of the best preserved crocodyliforms from Paleocene deposits recovered so far and represents a sebecosuchian, one of the few clades that survived the Cretaceous-Paleogene biotic crisis. The new taxon is found in the same deposit as an alligatoroid, a group that experienced large diversification in the Paleogene. The sebecosuchian record suggests that after the Cretaceous-Paleogene biotic crisis, the less specialized members of this clade characterized by a higher number of teeth compared to the baurusuchid sebecosuchians survived, some having terrestrial habits while others developed a semi-aquatic life style (e.g., Lorosuchus). Starting in the Eocene, sebecid sebecosuchians became specialized with a more accentuated oreinirostry as observed in Sebecus and in Langstonia, but not showing the typical reduced dentition developed by the Cretaceous baurusuchid sebecosuchians. The basal position of Barinasuchus arveloi, a high-snouted Miocene sebecid, indicates the occurrence of an independent lineage sometime after the K-Pg biotic crisis that developed accentuated oreinirostry, suggesting a more complex history of the post-K-Pg crocodyliform radiation.
format	article
author	Alexander W A Kellner André E P Pinheiro Diogenes A Campos
author_facet	Alexander W A Kellner André E P Pinheiro Diogenes A Campos
author_sort	Alexander W A Kellner
title	A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.
title_short	A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.
title_full	A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.
title_fullStr	A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.
title_full_unstemmed	A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.
title_sort	new sebecid from the paleogene of brazil and the crocodyliform radiation after the k-pg boundary.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/7022ff5bbd3d41ee9341fcedc6c77607
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A new sebecid from the paleogene of Brazil and the crocodyliform radiation after the K-Pg boundary.

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