Ammonites of the Middle Tithonian Internispinosum Zone from Barda Negra, southern Neuquén-Mendoza Basin, Argentina

An ammonite fauna from an isolated outcrop of the Upper Jurassic Vaca Muerta Formation is described from Barda Negra in the southern part of the Neuquén-Mendoza Basin. It comprises several macroconch specimens of the species Aspidoceras cf. euomphalum Steuer, 1897 besides macroconchs and microconchs...

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Detalles Bibliográficos
Autores principales: Parent, Horacio, Scherzinger, Armin, Schweigert, Günter, Capello, Oscar D.
Formato: article artículo publishedVersion
Lenguaje:Inglés
Publicado: Instituto de Fisiografía y Geología 2008
Materias:
Tithonian
Neuquén-Mendoza Basin
Aspidoceras
Windhauseniceras
Sexual Dimorphism
Biostratigraphy
Tithoniano
Cuenca Neuquén-Mendoza
Dimorfismo sexual
Bioestratigrafía
Acceso en línea:http://hdl.handle.net/2133/972
http://hdl.handle.net/2133/972
Aporte de:
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) de Universidad Nacional de Rosario
Descripción
Sumario:An ammonite fauna from an isolated outcrop of the Upper Jurassic Vaca Muerta Formation is described from Barda Negra in the southern part of the Neuquén-Mendoza Basin. It comprises several macroconch specimens of the species Aspidoceras cf. euomphalum Steuer, 1897 besides macroconchs and microconchs of Windhauseniceras internispinosum (Krantz, 1926), the index species of the Andean Middle Tithonian Internispinosum Zone. Morphological and taxonomic relationships of the studied aspidoceratids with previously described species and the sexual dimorphism in W. internispinosum are discussed.

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