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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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/97264 2023-05-15T13:47:46+02:00 Skates and rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Alfredo Kriwet, Jürgen 2019-09 application/pdf 1028-1044 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 en eng Historical Biology vol. 31, no. 8 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 issn:1029-2381 http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) CC-BY Paleontología Antarctic Peninsula Batoids Paleogene Southern Ocean Articulo 2019 ftunivlaplata 2020-09-20T00:01:05Z 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. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Southern Ocean Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Antarctic Antarctic Peninsula Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Southern Ocean |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
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. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
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 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Seymour Seymour Island Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Seymour Seymour Island Southern Ocean |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Southern Ocean |
op_relation |
Historical Biology vol. 31, no. 8 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 issn:1029-2381 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
op_rightsnorm |
CC-BY |
_version_ |
1766247822787608576 |