A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity

Elasmosaurids are one of the most frequently recorded marine reptiles from the Weddellian Province (Patagonia, Western Antarctica and New Zealand). Improvements in our knowledge of elasmosaurid diversity have been problematic because of their conservative postcranial morphology. However, recent stud...

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Autores principales: O'Gorman, José Patricio, Panzeri, Karen Magalí, Fernández, Marta Susana, Santillana, Sergio, Moly, Juan José, Reguero, Marcelo Alfredo
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Elasmosauridae
López de Bertodano
weddellonectia
Plesiosauria
marine reptiles
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/148051
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-148051
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Elasmosauridae
López de Bertodano
weddellonectia
Plesiosauria
marine reptiles
spellingShingle Ciencias Naturales
Elasmosauridae
López de Bertodano
weddellonectia
Plesiosauria
marine reptiles
O'Gorman, José Patricio
Panzeri, Karen Magalí
Fernández, Marta Susana
Santillana, Sergio
Moly, Juan José
Reguero, Marcelo Alfredo
A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity
topic_facet Ciencias Naturales
Elasmosauridae
López de Bertodano
weddellonectia
Plesiosauria
marine reptiles
description Elasmosaurids are one of the most frequently recorded marine reptiles from the Weddellian Province (Patagonia, Western Antarctica and New Zealand). Improvements in our knowledge of elasmosaurid diversity have been problematic because of their conservative postcranial morphology. However, recent studies have helped to improved our understanding of the diversity of this group. Here, a new elasmosaurid specimen from the upper Maatrichtian horizons of the López de Bertodano Formation, Antarctica, MLP 14-I-20-16, is described. MLP 14-I-20-16 is one of the youngest non-aristonectine weddellonectian elasmosaurids from Antarctica. We confirm the coexistence of aristonectine and non-aristonectine elasmosaurids in Antarctica until the end of the Cretaceous. MLP 14-I-20-16 shows distinctive short and broad posterior cervical vertebrae, a feature only shared among the weddellonectian elasmosaurids by the Maastrichtian <i>Morenosaurus stocki</i>, although the same vertebral proportions are also recorded for the giant Cenomanian elasmosaurids <i>Thalassomedon haningtoni</i>. Comparison between MLP 14-I-20-16 and other elasmosaurids from the Maastrichtian of Antarctica indicates that at least two different non-aristonectine elasmosaurids were present in Antarctica during the late Maastrichtian.
format Articulo
Preprint
author O'Gorman, José Patricio
Panzeri, Karen Magalí
Fernández, Marta Susana
Santillana, Sergio
Moly, Juan José
Reguero, Marcelo Alfredo
author_facet O'Gorman, José Patricio
Panzeri, Karen Magalí
Fernández, Marta Susana
Santillana, Sergio
Moly, Juan José
Reguero, Marcelo Alfredo
author_sort O'Gorman, José Patricio
title A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity
title_short A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity
title_full A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity
title_fullStr A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity
title_full_unstemmed A new elasmosaurid from the upper Maastrichtian López de Bertodano Formation: new data on weddellonectian diversity
title_sort new elasmosaurid from the upper maastrichtian lópez de bertodano formation: new data on weddellonectian diversity
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/148051
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