The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina

Plesiosaurs are recorded for the first time from the lower section of Mata Amarilla Formation, Santa Cruz Province, Patagonia, Argentina. The stratigraphic succession consists of mudstones and siltstones interbedded with medium to fine-grained sandstone, deposited in a littoral environment during th...

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Detalles Bibliográficos
Autores principales: O'Gorman, José Patricio, Varela, Augusto Nicolás
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Paleontología
Plesiosaurs
Formación mata amarilla
Upper cretaceous
Santa cruz
Argentina
Mata amarilla formation
Plesiosaurios
Cretácico superior
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/95720
https://ri.conicet.gov.ar/11336/74599
http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/260
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-95720
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Plesiosaurs
Formación mata amarilla
Upper cretaceous
Santa cruz
Argentina
Mata amarilla formation
Plesiosaurios
Cretácico superior
spellingShingle Paleontología
Plesiosaurs
Formación mata amarilla
Upper cretaceous
Santa cruz
Argentina
Mata amarilla formation
Plesiosaurios
Cretácico superior
O'Gorman, José Patricio
Varela, Augusto Nicolás
The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina
topic_facet Paleontología
Plesiosaurs
Formación mata amarilla
Upper cretaceous
Santa cruz
Argentina
Mata amarilla formation
Plesiosaurios
Cretácico superior
description Plesiosaurs are recorded for the first time from the lower section of Mata Amarilla Formation, Santa Cruz Province, Patagonia, Argentina. The stratigraphic succession consists of mudstones and siltstones interbedded with medium to fine-grained sandstone, deposited in a littoral environment during the Cenomanian-Santonian; therefore the material is the oldest record of plesiosaurs from the lower Late Cretaceous rocks of Argentina. The remains include teeth, some vertebrae, and one propodium assigned to Elasmosauridae indet. and Plesiosauria indet. The status of Polyptychodon patagonicus Ameghino, 1893, as well as its stratigraphic position are discussed, leading to the conclusion that the material described by Ameghino is probably from the Mata Amarilla Formation and can only be referred to Plesiosauria indet. Analysis of sedimentologic features suggests that the material described here was deposited in an estuarine environment, strongly influenced by tides. The characters of the inferred environment are consistent with the type of preservation of the materials.
format Articulo
Articulo
author O'Gorman, José Patricio
Varela, Augusto Nicolás
author_facet O'Gorman, José Patricio
Varela, Augusto Nicolás
author_sort O'Gorman, José Patricio
title The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina
title_short The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina
title_full The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina
title_fullStr The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina
title_full_unstemmed The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina
title_sort oldest lower upper cretaceous plesiosaurs (reptilia, sauropterygia) from southern patagonia, argentina
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/95720
https://ri.conicet.gov.ar/11336/74599
http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/260
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