Data/hora: 16/06/2024 11:19:04

Provedor de dados: | 41
País: | Argentina
Título: | Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile
Autores: | Aguirre-Urreta,Beatriz; Suárez,Manuel; de la Cruz,Rita; Ramos,Victor A.
Data: | 2007-06-01
Ano: | 2007
Palavras-chave: | Ammonoids; Crioceratitinae; Hauterivian; Austral Basin; Chile.
Resumo: | 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 Léveillé), 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142007000200010
Editor: | Asociación Paleontológica Argentina
Formato: | text/html
Fonte: | Ameghiniana  v.44 n.2 2007
Fonte: | info:eu-repo/semantics/openAccess