New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes)
ABSTRACT: Until now Eocene chimeroid holocephalians of Antarctica have been known from only a few specimens attributed to two species from the Eocene of Seymour Island. New material collected by Polish and English field parties includes numerous tooth plates and fin spine fragments from the Eocene L...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.608.4596 2023-05-15T13:50:28+02:00 New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) Jürgen Kriwet Andrzej Gaździcki The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.608.4596 http://www.polar.pan.pl/ppr24/ppr24-029.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.608.4596 http://www.polar.pan.pl/ppr24/ppr24-029.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.polar.pan.pl/ppr24/ppr24-029.pdf text ftciteseerx 2016-01-08T14:22:44Z ABSTRACT: Until now Eocene chimeroid holocephalians of Antarctica have been known from only a few specimens attributed to two species from the Eocene of Seymour Island. New material collected by Polish and English field parties includes numerous tooth plates and fin spine fragments from the Eocene La Meseta Formation. We describe a new species, Callorhinchus stahli, based on two mandibular and a single fragmentary palatine tooth plate. In addition, the stratigraphic distribution and diversity of Eocene Antarctic chime− roids is discussed. The chimeroid Ischyodus shows the greatest stratigraphic distribution with its greatest abundance in the middle parts of the La Meseta Formation while Chimaera and Callorhinchus are restricted to the lower ones. Changes in the environment and habitat availability most probably triggered the distributional pattern and the disappearance of chimeroids. K e y w o r d s: Antarctica, La Meseta Formation (Eocene), palaeontology (chimeroid fish), new species, ecology. Text Antarc* Antarctic Antarctica Seymour Island Unknown Antarctic Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
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Open Polar |
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Unknown |
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ftciteseerx |
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English |
description |
ABSTRACT: Until now Eocene chimeroid holocephalians of Antarctica have been known from only a few specimens attributed to two species from the Eocene of Seymour Island. New material collected by Polish and English field parties includes numerous tooth plates and fin spine fragments from the Eocene La Meseta Formation. We describe a new species, Callorhinchus stahli, based on two mandibular and a single fragmentary palatine tooth plate. In addition, the stratigraphic distribution and diversity of Eocene Antarctic chime− roids is discussed. The chimeroid Ischyodus shows the greatest stratigraphic distribution with its greatest abundance in the middle parts of the La Meseta Formation while Chimaera and Callorhinchus are restricted to the lower ones. Changes in the environment and habitat availability most probably triggered the distributional pattern and the disappearance of chimeroids. K e y w o r d s: Antarctica, La Meseta Formation (Eocene), palaeontology (chimeroid fish), new species, ecology. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jürgen Kriwet Andrzej Gaździcki |
spellingShingle |
Jürgen Kriwet Andrzej Gaździcki New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) |
author_facet |
Jürgen Kriwet Andrzej Gaździcki |
author_sort |
Jürgen Kriwet |
title |
New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) |
title_short |
New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) |
title_full |
New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) |
title_fullStr |
New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) |
title_full_unstemmed |
New Eocene Antarctic chimeroid fish (Holocephali, Chimaeriformes) |
title_sort |
new eocene antarctic chimeroid fish (holocephali, chimaeriformes) |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.608.4596 http://www.polar.pan.pl/ppr24/ppr24-029.pdf |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Seymour Seymour Island |
geographic_facet |
Antarctic Seymour Seymour Island |
genre |
Antarc* Antarctic Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctica Seymour Island |
op_source |
http://www.polar.pan.pl/ppr24/ppr24-029.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.608.4596 http://www.polar.pan.pl/ppr24/ppr24-029.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766253516674826240 |