Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos

The fauna studied came from differen Middle Jurassic sections of Neuquen, Mendoza (Argentina) and Atacama (Chile) provinces. The taxonomic and chronologic review of the early Middle Jurassic (Aalenian to Middle Bajocian) Hildocerataceae, including type material, recently described (Westermann &...

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Detalles Bibliográficos
Autores principales: Westermann, G. E. G., Riccardi, Alberto Carlos
Formato: Articulo
Lenguaje:Español
Publicado: 1972
Materias:
Ciencias Naturales
Geología
Argentina
Chile
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/67769
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-67769
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Naturales
Geología
Argentina
Chile
spellingShingle Ciencias Naturales
Geología
Argentina
Chile
Westermann, G. E. G.
Riccardi, Alberto Carlos
Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos
topic_facet Ciencias Naturales
Geología
Argentina
Chile
description The fauna studied came from differen Middle Jurassic sections of Neuquen, Mendoza (Argentina) and Atacama (Chile) provinces. The taxonomic and chronologic review of the early Middle Jurassic (Aalenian to Middle Bajocian) Hildocerataceae, including type material, recently described (Westermann & Riccardi, 1972), demonstrates the existence of about 40 species, although a number of previously described species are regarded as conspecific. Several subgenera and species were formerly known only from Europe. The Aalenian is mostly rather poorly fossiliferous, yielding locally the genera Leioceras (?), Staufenia (?), Tmetoceras, Bredya, Erycites y Planammatoceras. Several diverse ammonoid assemblages occur at the approximate base of the Bajocian, with Eudmetoceras s.s, E. (Euaptetcceras ), Fontannesia (?), Zurcheria, Sonninia s.s., S. (Euhoploceras ), Tmetoceras and the endemic genus Puchenquia Westermann and Riccardi. Superjacent Sonninia (Fissilobiceras) zitteli (Gottsche) and Pseudotoite clearly indicate the Sowerby Zone, in which S. (Papilliceras) espinazitensis Tornquist appears. The Sauzei 'Zone yields this last species, early Dorsetensia, Otoitidae and early Stephanoceratidae. The Humphriesianum Zone is established by Dorsetensia romani (Oppel ), D. liostraca Buckman, with Stephanoceras ex gr. S. humphriesianum (Sowerby).
format Articulo
Articulo
author Westermann, G. E. G.
Riccardi, Alberto Carlos
author_facet Westermann, G. E. G.
Riccardi, Alberto Carlos
author_sort Westermann, G. E. G.
title Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos
title_short Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos
title_full Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos
title_fullStr Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos
title_full_unstemmed Amonitas y estratigrafia del Aaleniano-Bayociano en los Andes argentino-chilenos
title_sort amonitas y estratigrafia del aaleniano-bayociano en los andes argentino-chilenos
publishDate 1972
url http://sedici.unlp.edu.ar/handle/10915/67769
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