The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate

Elasmosaurids are a monophyletic group of cosmopolitan plesiosaurs with extremely long necks. Although abundant elasmosaurid material has been collected from the Upper Cretaceous of Antarctica, skull material is extremely rare. Here, new elasmosaurid cranial material from the lower Maastrichtian lev...

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Detalles Bibliográficos
Autores principales: O'Gorman, José Patricio, Coria, Rodolfo Anibal, Reguero, Marcelo Alfredo, Santillana, Sergio, Mörs, Thomas, Cardenas, Magali
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2018
Materias:
Paleontología
Ciencias Naturales
Cape lamb member
Elasmosauridae
Plesiosauria
Snows hill island formation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/97759
https://ri.conicet.gov.ar/11336/83625
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-97759
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Ciencias Naturales
Cape lamb member
Elasmosauridae
Plesiosauria
Snows hill island formation
spellingShingle Paleontología
Ciencias Naturales
Cape lamb member
Elasmosauridae
Plesiosauria
Snows hill island formation
O'Gorman, José Patricio
Coria, Rodolfo Anibal
Reguero, Marcelo Alfredo
Santillana, Sergio
Mörs, Thomas
Cardenas, Magali
The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate
topic_facet Paleontología
Ciencias Naturales
Cape lamb member
Elasmosauridae
Plesiosauria
Snows hill island formation
description Elasmosaurids are a monophyletic group of cosmopolitan plesiosaurs with extremely long necks. Although abundant elasmosaurid material has been collected from the Upper Cretaceous of Antarctica, skull material is extremely rare. Here, new elasmosaurid cranial material from the lower Maastrichtian levels of the Cape Lamb Member (Snow Hill Island Formation) on Vega Island, Antarctica is described. The studied specimen (MLP 15-I-7-6) is a non-aristonectine elasmosaurid but shows a palate morphology characterized by the absence of a posterior interpterygoid symphysis and a posterior plate-like extension of the pterygoids, features previously associated with the aristonectine palatal structure. The specimen MLP 15-I-7-6 thus provides an indication that these palatal features are also present in non-aristonectine Weddellian elasmosaurids, and makes available additional evidence of the close phylogenetical relationship between the aristonectines and some Weddellian non-aristonectine elasmosaurids.
format Articulo
Preprint
author O'Gorman, José Patricio
Coria, Rodolfo Anibal
Reguero, Marcelo Alfredo
Santillana, Sergio
Mörs, Thomas
Cardenas, Magali
author_facet O'Gorman, José Patricio
Coria, Rodolfo Anibal
Reguero, Marcelo Alfredo
Santillana, Sergio
Mörs, Thomas
Cardenas, Magali
author_sort O'Gorman, José Patricio
title The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate
title_short The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate
title_full The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate
title_fullStr The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate
title_full_unstemmed The first non-aristonectine elasmosaurid (Sauropterygia; Plesiosauria) cranial material from Antarctica : New data on the evolution of the elasmosaurid basicranium and palate
title_sort first non-aristonectine elasmosaurid (sauropterygia; plesiosauria) cranial material from antarctica : new data on the evolution of the elasmosaurid basicranium and palate
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/97759
https://ri.conicet.gov.ar/11336/83625
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