Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica

Eocene deposits of the famous La Meseta Formation of Seymour Island, Antarctic Peninsula, yielded the most diverse Paleogene fossil elasmobranch association of the Southern Hemisphere. In this assemblage, sharks clearly dominate the fauna, whereas batoids are very rare components. Herein, we describ...

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Autores principales: Engelbrecht, Andrea, Mörs, Thomas, Reguero, Marcelo Alfredo, Kriwet, Jürgen
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Paleontología
Antarctic Peninsula
Batoids
Paleogene
Southern Ocean
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/97264
https://ri.conicet.gov.ar/11336/94645
https://www.tandfonline.com/doi/full/10.1080/08912963.2017.1417403
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-97264
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Antarctic Peninsula
Batoids
Paleogene
Southern Ocean
spellingShingle Paleontología
Antarctic Peninsula
Batoids
Paleogene
Southern Ocean
Engelbrecht, Andrea
Mörs, Thomas
Reguero, Marcelo Alfredo
Kriwet, Jürgen
Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica
topic_facet Paleontología
Antarctic Peninsula
Batoids
Paleogene
Southern Ocean
description Eocene deposits of the famous La Meseta Formation of Seymour Island, Antarctic Peninsula, yielded the most diverse Paleogene fossil elasmobranch association of the Southern Hemisphere. In this assemblage, sharks clearly dominate the fauna, whereas batoids are very rare components. Herein, we describe two new taxa of cold water tolerant skates, Marambioraja leiostemma gen. et sp. nov., and Mesetaraja maleficapelli gen. et sp. nov., two new species of the genus Raja, Raja amphitrita sp. nov. and Raja manitaria sp. nov., as well as remains of warm water adapted myliobatiforms. It is, however, not possible to unambiguously assign these remains either to Myliobatidae or Rhinopteridae, or to any specific genus. Previously reported remains of Raja/Bathyraja sp. are assigned to the new described species Raja manitaria sp. nov. The biogeographic distribution of extant and extinct rays and skates clearly shows that both groups are more widely distributed today than in the past, and additionally seem to have been more diverse in the Northern than the Southern Hemisphere. The occurrence, albeit rare of isolated teeth of skates (Rajidae) and rays (Myliobatidae) in the La Meseta Formation representes a minimum age constraint for their first appearance in the Southern Ocean.
format Articulo
Articulo
author Engelbrecht, Andrea
Mörs, Thomas
Reguero, Marcelo Alfredo
Kriwet, Jürgen
author_facet Engelbrecht, Andrea
Mörs, Thomas
Reguero, Marcelo Alfredo
Kriwet, Jürgen
author_sort Engelbrecht, Andrea
title Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica
title_short Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica
title_full Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica
title_fullStr Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica
title_full_unstemmed Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica
title_sort skates and rays (elasmobranchii, batomorphii) from the eocene la meseta and submeseta formations, seymour island, antarctica
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/97264
https://ri.conicet.gov.ar/11336/94645
https://www.tandfonline.com/doi/full/10.1080/08912963.2017.1417403
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