The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)

The oldest record of the hexanchiform sharks from the Southern Hemisphere and the second chondrichthyan report known from Carboniferous to Early Cretaceous beds in Antarctica is given. The material was collected in late Aptian rocks of the Kotick Point Formation outcropping in the western part of Ja...

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Detalles Bibliográficos
Autores principales: Cione, A.L., Medina, F.
Formato: JOUR
Materias:
Aptian
Hexanchiformes
James Ross Island
Neoselachii
Carboniferous
Cenomanian
fossil record
shark
Southern Hemisphere
subantarctic region
tooth
Antarctic Peninsula
Antarctica
West Antarctica
Chondrichthyes
Hexanchus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09541020_v21_n5_p501_Cione
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09541020_v21_n5_p501_Cione
record_format dspace
spelling todo:paper_09541020_v21_n5_p501_Cione2023-10-03T15:51:38Z The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica) Cione, A.L. Medina, F. Aptian Hexanchiformes James Ross Island Neoselachii Aptian Carboniferous Cenomanian fossil record shark Southern Hemisphere subantarctic region tooth Antarctic Peninsula Antarctica James Ross Island West Antarctica Chondrichthyes Hexanchiformes Hexanchus Neoselachii The oldest record of the hexanchiform sharks from the Southern Hemisphere and the second chondrichthyan report known from Carboniferous to Early Cretaceous beds in Antarctica is given. The material was collected in late Aptian rocks of the Kotick Point Formation outcropping in the western part of James Ross Island, near Antarctic Peninsula. It consists of an isolated tooth assignable to a hexanchiform different from the other described genera. The tooth shows putative plesiomorphic cusp (few cusps, no serrations) and apomorphic root characters (relatively deep, quadrangular). It could be related to a species close to the origin of Hexanchus (unknown in beds older than Cenomanian). © Antarctic Science Ltd 2009. Fil:Medina, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09541020_v21_n5_p501_Cione
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Aptian
Hexanchiformes
James Ross Island
Neoselachii
Aptian
Carboniferous
Cenomanian
fossil record
shark
Southern Hemisphere
subantarctic region
tooth
Antarctic Peninsula
Antarctica
James Ross Island
West Antarctica
Chondrichthyes
Hexanchiformes
Hexanchus
Neoselachii
spellingShingle Aptian
Hexanchiformes
James Ross Island
Neoselachii
Aptian
Carboniferous
Cenomanian
fossil record
shark
Southern Hemisphere
subantarctic region
tooth
Antarctic Peninsula
Antarctica
James Ross Island
West Antarctica
Chondrichthyes
Hexanchiformes
Hexanchus
Neoselachii
Cione, A.L.
Medina, F.
The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
topic_facet Aptian
Hexanchiformes
James Ross Island
Neoselachii
Aptian
Carboniferous
Cenomanian
fossil record
shark
Southern Hemisphere
subantarctic region
tooth
Antarctic Peninsula
Antarctica
James Ross Island
West Antarctica
Chondrichthyes
Hexanchiformes
Hexanchus
Neoselachii
description The oldest record of the hexanchiform sharks from the Southern Hemisphere and the second chondrichthyan report known from Carboniferous to Early Cretaceous beds in Antarctica is given. The material was collected in late Aptian rocks of the Kotick Point Formation outcropping in the western part of James Ross Island, near Antarctic Peninsula. It consists of an isolated tooth assignable to a hexanchiform different from the other described genera. The tooth shows putative plesiomorphic cusp (few cusps, no serrations) and apomorphic root characters (relatively deep, quadrangular). It could be related to a species close to the origin of Hexanchus (unknown in beds older than Cenomanian). © Antarctic Science Ltd 2009.
format JOUR
author Cione, A.L.
Medina, F.
author_facet Cione, A.L.
Medina, F.
author_sort Cione, A.L.
title The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
title_short The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
title_full The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
title_fullStr The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
title_full_unstemmed The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
title_sort oldest hexanchiform shark from the southern hemisphere (neoselachii; early cretaceous, antarctica)
url http://hdl.handle.net/20.500.12110/paper_09541020_v21_n5_p501_Cione
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AT medinaf theoldesthexanchiformsharkfromthesouthernhemisphereneoselachiiearlycretaceousantarctica
AT cioneal oldesthexanchiformsharkfromthesouthernhemisphereneoselachiiearlycretaceousantarctica
AT medinaf oldesthexanchiformsharkfromthesouthernhemisphereneoselachiiearlycretaceousantarctica
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