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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ftpubmed:oai:pubmedcentral.nih.gov:5447807 2023-05-15T13:41:05+02:00 A new sawshark, Pristiophorus laevis, from the Eocene of Antarctica with comments on Pristiophorus lanceolatus Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo A. Kriwet, Jürgen 2016-11-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5447807/ http://www.ncbi.nlm.nih.gov/pubmed/28579693 https://doi.org/10.1080/08912963.2016.1252761 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5447807/ http://www.ncbi.nlm.nih.gov/pubmed/28579693 http://dx.doi.org/10.1080/08912963.2016.1252761 Article Text 2016 ftpubmed https://doi.org/10.1080/08912963.2016.1252761 2018-01-07T01:17:35Z 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. Text Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island PubMed Central (PMC) 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) The Antarctic Historical Biology 29 6 841 853 |
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Article Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo A. Kriwet, Jürgen A new sawshark, Pristiophorus laevis, from the Eocene of Antarctica with comments on Pristiophorus lanceolatus |
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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. |
format |
Text |
author |
Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo A. Kriwet, Jürgen |
author_facet |
Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo A. 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://www.ncbi.nlm.nih.gov/pmc/articles/PMC5447807/ http://www.ncbi.nlm.nih.gov/pubmed/28579693 https://doi.org/10.1080/08912963.2016.1252761 |
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 The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula New Zealand Seymour Seymour Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5447807/ http://www.ncbi.nlm.nih.gov/pubmed/28579693 http://dx.doi.org/10.1080/08912963.2016.1252761 |
op_doi |
https://doi.org/10.1080/08912963.2016.1252761 |
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Historical Biology |
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29 |
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6 |
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841 |
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853 |
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1766145588469956608 |