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
Autor principal:	Medina, Francisco Alberto
Publicado:	2009
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v21_n5_p501_Cione 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	paper:paper_09541020_v21_n5_p501_Cione
record_format	dspace
spelling	paper:paper_09541020_v21_n5_p501_Cione2023-06-08T15:55:44Z The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica) Medina, Francisco Alberto 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. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v21_n5_p501_Cione 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 Medina, Francisco Alberto 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.
author	Medina, Francisco Alberto
author_facet	Medina, Francisco Alberto
author_sort	Medina, Francisco Alberto
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)
publishDate	2009
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v21_n5_p501_Cione http://hdl.handle.net/20.500.12110/paper_09541020_v21_n5_p501_Cione
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The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)

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