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Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)

The Urumaco stratigraphic sequence, western Venezuela, preserves a variety of paleoenvironments that include terrestrial, riverine, lacustrine and marine facies. A wide range of fossil vertebrates associated with these facies supports the hypothesis of an estuary in that geographic area connected wi...

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Autores principales: Carrillo-Briceño, Jorge D., Maxwell, Erin, Aguilera, Orangel A., Sánchez, Rodolfo, Sánchez-Villagra, Marcelo R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619466/
https://www.ncbi.nlm.nih.gov/pubmed/26488163
http://dx.doi.org/10.1371/journal.pone.0139230
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author Carrillo-Briceño, Jorge D.
Maxwell, Erin
Aguilera, Orangel A.
Sánchez, Rodolfo
Sánchez-Villagra, Marcelo R.
author_facet Carrillo-Briceño, Jorge D.
Maxwell, Erin
Aguilera, Orangel A.
Sánchez, Rodolfo
Sánchez-Villagra, Marcelo R.
author_sort Carrillo-Briceño, Jorge D.
collection PubMed
description The Urumaco stratigraphic sequence, western Venezuela, preserves a variety of paleoenvironments that include terrestrial, riverine, lacustrine and marine facies. A wide range of fossil vertebrates associated with these facies supports the hypothesis of an estuary in that geographic area connected with a hydrographic system that flowed from western Amazonia up to the Proto-Caribbean Sea during the Miocene. Here the elasmobranch assemblages of the middle Miocene to middle Pliocene section of the Urumaco sequence (Socorro, Urumaco and Codore formations) are described. Based on new findings, we document at least 21 taxa of the Lamniformes, Carcharhiniformes, Myliobatiformes and Rajiformes, and describe a new carcharhiniform species (†Carcharhinus caquetius sp. nov.). Moreover, the Urumaco Formation has a high number of well-preserved fossil Pristis rostra, for which we provide a detailed taxonomic revision, and referral in the context of the global Miocene record of Pristis as well as extant species. Using the habitat preference of the living representatives, we hypothesize that the fossil chondrichthyan assemblages from the Urumaco sequence are evidence for marine shallow waters and estuarine habitats.
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spelling pubmed-46194662015-10-29 Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela) Carrillo-Briceño, Jorge D. Maxwell, Erin Aguilera, Orangel A. Sánchez, Rodolfo Sánchez-Villagra, Marcelo R. PLoS One Research Article The Urumaco stratigraphic sequence, western Venezuela, preserves a variety of paleoenvironments that include terrestrial, riverine, lacustrine and marine facies. A wide range of fossil vertebrates associated with these facies supports the hypothesis of an estuary in that geographic area connected with a hydrographic system that flowed from western Amazonia up to the Proto-Caribbean Sea during the Miocene. Here the elasmobranch assemblages of the middle Miocene to middle Pliocene section of the Urumaco sequence (Socorro, Urumaco and Codore formations) are described. Based on new findings, we document at least 21 taxa of the Lamniformes, Carcharhiniformes, Myliobatiformes and Rajiformes, and describe a new carcharhiniform species (†Carcharhinus caquetius sp. nov.). Moreover, the Urumaco Formation has a high number of well-preserved fossil Pristis rostra, for which we provide a detailed taxonomic revision, and referral in the context of the global Miocene record of Pristis as well as extant species. Using the habitat preference of the living representatives, we hypothesize that the fossil chondrichthyan assemblages from the Urumaco sequence are evidence for marine shallow waters and estuarine habitats. Public Library of Science 2015-10-21 /pmc/articles/PMC4619466/ /pubmed/26488163 http://dx.doi.org/10.1371/journal.pone.0139230 Text en © 2015 Carrillo-Briceño et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Carrillo-Briceño, Jorge D.
Maxwell, Erin
Aguilera, Orangel A.
Sánchez, Rodolfo
Sánchez-Villagra, Marcelo R.
Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)
title Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)
title_full Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)
title_fullStr Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)
title_full_unstemmed Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)
title_short Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela)
title_sort sawfishes and other elasmobranch assemblages from the mio-pliocene of the south caribbean (urumaco sequence, northwestern venezuela)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619466/
https://www.ncbi.nlm.nih.gov/pubmed/26488163
http://dx.doi.org/10.1371/journal.pone.0139230
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