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Abstract:

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.

Registro:

Documento: Artículo
Título:The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)
Autor:Cione, A.L.; Medina, F.
Filiación:División Paleontología de Vertebrados, Museo de la Plata, 1900 La Plata, Argentina
Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave: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
Año:2009
Volumen:21
Número:5
Página de inicio:501
Página de fin:504
DOI: http://dx.doi.org/10.1017/S0954102009990228
Título revista:Antarctic Science
Título revista abreviado:Antarct. Sci.
ISSN:09541020
CODEN:ANTSE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v21_n5_p501_Cione

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Citas:

---------- APA ----------
Cione, A.L. & Medina, F. (2009) . The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica). Antarctic Science, 21(5), 501-504.
http://dx.doi.org/10.1017/S0954102009990228
---------- CHICAGO ----------
Cione, A.L., Medina, F. "The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)" . Antarctic Science 21, no. 5 (2009) : 501-504.
http://dx.doi.org/10.1017/S0954102009990228
---------- MLA ----------
Cione, A.L., Medina, F. "The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica)" . Antarctic Science, vol. 21, no. 5, 2009, pp. 501-504.
http://dx.doi.org/10.1017/S0954102009990228
---------- VANCOUVER ----------
Cione, A.L., Medina, F. The oldest hexanchiform shark from the Southern Hemisphere (Neoselachii; Early Cretaceous, Antarctica). Antarct. Sci. 2009;21(5):501-504.
http://dx.doi.org/10.1017/S0954102009990228