Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera

The glacigenic boulders from the Hirnantian Don Braulio Formation of the Argentine Precordillera contain a well preserved shelly fauna allowing to a better knowledge of brachiopods and bivalves, but gastropods remain undescribed. The purpose of this paper is to give a preliminary list of gastropods...

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Detalles Bibliográficos
Autor principal: Bertero, Verónica
Formato: Objeto de conferencia Resumen
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Naturales
Paleontología
Ordovícico
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/16769
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-16769
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Paleontología
Ordovícico
spellingShingle Ciencias Naturales
Paleontología
Ordovícico
Bertero, Verónica
Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera
topic_facet Ciencias Naturales
Paleontología
Ordovícico
description The glacigenic boulders from the Hirnantian Don Braulio Formation of the Argentine Precordillera contain a well preserved shelly fauna allowing to a better knowledge of brachiopods and bivalves, but gastropods remain undescribed. The purpose of this paper is to give a preliminary list of gastropods and to evaluate their paleobiogeographic affinities. The following taxa have been recognized: Tropidodiscus sp., Raphistoma sp., Clahtrospira aff. C. subconica Hall and Tetranota bidorsata Hall. Other contemporary coarse-grained boulders have yielded Bucania sp., Cyclonema sp., Clathrospira sp., Trochonema? sp., bellerophontids, platyceratids, Hormotoma-like forms, murchisonids and lophospirids indet. This material is not well preserved enough for accurate identifications. The genus Tropidodiscus Meek and Worthen has been proposed as a potential paleobiogeographical marker for the Mediterranean Province, and consequently for cold water environments. Tetranota bidorsata Hall and Clathrospira subconica Hall are common taxa in the Upper Ordovician Trenton Limestone. Such a mixture of faunas is consistent with the paleogeographic pattern of rhynchonelliform brachiopods, which display Mediterranean, Anglo-Baltic and Laurentian affinities. The studied gastropod assemblage includes mainly widespread taxa, lacking the marked endemism showed by coeval bivalves.
format Objeto de conferencia
Resumen
author Bertero, Verónica
author_facet Bertero, Verónica
author_sort Bertero, Verónica
title Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera
title_short Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera
title_full Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera
title_fullStr Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera
title_full_unstemmed Upper Ordovician (Sandbian) gastropods from redeposited boulders in the Don Braulio Formation, Argentine Precordillera
title_sort upper ordovician (sandbian) gastropods from redeposited boulders in the don braulio formation, argentine precordillera
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/16769
work_keys_str_mv AT berteroveronica upperordoviciansandbiangastropodsfromredepositedbouldersinthedonbraulioformationargentineprecordillera
bdutipo_str Repositorios
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