A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus
The highly fossiliferous Eocene deposits of the Antarctic Peninsula are among the most productive sites for fossil remains in the Southern Hemisphere and offer rare insights into high-latitude faunas during the Palaeogene. Chondrichthyans, which are represented by abundant isolated remains, seemingl...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/108333 2023-05-15T14:02:58+02:00 A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Alfredo Kriwet, Jürgen 2016 application/pdf http://sedici.unlp.edu.ar/handle/10915/108333 en eng Historical Biology vol. 29, no. 6 http://sedici.unlp.edu.ar/handle/10915/108333 issn:1029-2381 http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) CC-BY Ciencias Naturales Seymour Island Palaeogene Southern Ocean Pristiophoridae new taxon Articulo 2016 ftunivlaplata 2020-11-08T01:02:22Z The highly fossiliferous Eocene deposits of the Antarctic Peninsula are among the most productive sites for fossil remains in the Southern Hemisphere and offer rare insights into high-latitude faunas during the Palaeogene. Chondrichthyans, which are represented by abundant isolated remains, seemingly dominate the marine assemblages. Eocene Antarctic sawsharks have only been known from few isolated rostral spines up to now, that were assigned to Pristiophorus lanceolatus. Here, we present the first oral teeth of a sawshark from the Eocene of Seymour Island and a re-evaluation of previously described Pristiophorus remains from Gondwana consisting exclusively of rostral spines. The holotype of Pristiophorus lanceolatus represents a single, abraded and insufficiently illustrated spine from the Oligocene of New Zealand. All other Cenozoic rostral spines assigned to this species are morphologically very indistinct and closely resemble those of living taxa. Consequently, we regard this species as dubious and introduce a new species, Pristiophorus laevis, based on oral teeth. The combination of dental characteristics of the new species makes it unique compared to all other described species based on oral teeth. Rostral spines from the Eocene of Seymour Island are assigned to this new species whereas those from other Cenozoic Gondwana localities remain ambiguous. 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 New Zealand Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Southern Ocean The Antarctic |
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 |
Ciencias Naturales Seymour Island Palaeogene Southern Ocean Pristiophoridae new taxon |
spellingShingle |
Ciencias Naturales Seymour Island Palaeogene Southern Ocean Pristiophoridae new taxon Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Alfredo Kriwet, Jürgen A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
topic_facet |
Ciencias Naturales Seymour Island Palaeogene Southern Ocean Pristiophoridae new taxon |
description |
The highly fossiliferous Eocene deposits of the Antarctic Peninsula are among the most productive sites for fossil remains in the Southern Hemisphere and offer rare insights into high-latitude faunas during the Palaeogene. Chondrichthyans, which are represented by abundant isolated remains, seemingly dominate the marine assemblages. Eocene Antarctic sawsharks have only been known from few isolated rostral spines up to now, that were assigned to Pristiophorus lanceolatus. Here, we present the first oral teeth of a sawshark from the Eocene of Seymour Island and a re-evaluation of previously described Pristiophorus remains from Gondwana consisting exclusively of rostral spines. The holotype of Pristiophorus lanceolatus represents a single, abraded and insufficiently illustrated spine from the Oligocene of New Zealand. All other Cenozoic rostral spines assigned to this species are morphologically very indistinct and closely resemble those of living taxa. Consequently, we regard this species as dubious and introduce a new species, Pristiophorus laevis, based on oral teeth. The combination of dental characteristics of the new species makes it unique compared to all other described species based on oral teeth. Rostral spines from the Eocene of Seymour Island are assigned to this new species whereas those from other Cenozoic Gondwana localities remain ambiguous. 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 |
A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
title_short |
A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
title_full |
A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
title_fullStr |
A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
title_full_unstemmed |
A new sawshark, Pristiophorus laevis , from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
title_sort |
new sawshark, pristiophorus laevis , from the eocene of antarctica with comments on pristiophorus lanceolatus |
publishDate |
2016 |
url |
http://sedici.unlp.edu.ar/handle/10915/108333 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula New Zealand Seymour Seymour Island Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula New Zealand Seymour Seymour Island Southern Ocean The Antarctic |
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. 29, no. 6 http://sedici.unlp.edu.ar/handle/10915/108333 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_ |
1766273424929325056 |