Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile

Beatriz Aguirre-Urreta, Manuel Suárez, Rita De La Cruz, Victor A. Ramos

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

4 Citas (Scopus)

Resumen

The low diversity of the Austral Basin ammonoid faunas was traditionally associated with a high degree of endemism. However, as reported herein, the ammonoids belonging to the Family Ancyloceratidae, Subfamily Crioceratitinae have affinities with European forms. Therefore, the Hauterivian ammonoids of the Austral Basin represent a mixture of endemic (Favrella Douvillé), with typical Tethyan examples (Hemihoplites Spath, Crioceratites Lé veillé), and faunas that are characteristic of Northwestern Europe on the margins of the Boreal realm (Protaconeceras Casey, Aegocrioceras Spath), although the endemic forms dominate in number of specimens. The following species are described here: Aegocrioceras patagonicum sp. nov. Aguirre-Urreta, Crioceratites (C.) apricum (Giovine) and Crioceratites sp. aff. C. (C.) schlagintweiti (Giovine). This rare and localized appearance of taxa of the Northern Hemisphere suggests periods of sea level rise that permitted widespread migration from this region to peripheral basins.

Idioma originalInglés
Páginas (desde-hasta)387-397
Número de páginas11
PublicaciónAmeghiniana
Volumen44
N.º2
EstadoPublicada - 30 jun 2007

Áreas temáticas de ASJC Scopus

  • Ecología, evolución, comportamiento y sistemática
  • Paleontología

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