Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile
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...
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2007
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v44_n2_p387_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00027014_v44_n2_p387_AguirreUrreta |
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paper:paper_00027014_v44_n2_p387_AguirreUrreta2023-06-08T14:22:14Z Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile Aguirre-Urreta, Maria Beatriz Ramos, Victor Alberto Ammonoids Austral Basin Chile Crioceratitinae Hauterivian ammonite Boreal endemic species fossil record sea level change species diversity taxonomy Austral Basin Patagonia South America Ammonoidea Ancyloceratidae 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. © Asociación Paleontológica Argentina. Fil:Aguirre-Urreta, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v44_n2_p387_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00027014_v44_n2_p387_AguirreUrreta |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Ammonoids Austral Basin Chile Crioceratitinae Hauterivian ammonite Boreal endemic species fossil record sea level change species diversity taxonomy Austral Basin Patagonia South America Ammonoidea Ancyloceratidae |
spellingShingle |
Ammonoids Austral Basin Chile Crioceratitinae Hauterivian ammonite Boreal endemic species fossil record sea level change species diversity taxonomy Austral Basin Patagonia South America Ammonoidea Ancyloceratidae Aguirre-Urreta, Maria Beatriz Ramos, Victor Alberto Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile |
topic_facet |
Ammonoids Austral Basin Chile Crioceratitinae Hauterivian ammonite Boreal endemic species fossil record sea level change species diversity taxonomy Austral Basin Patagonia South America Ammonoidea Ancyloceratidae |
description |
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. © Asociación Paleontológica Argentina. |
author |
Aguirre-Urreta, Maria Beatriz Ramos, Victor Alberto |
author_facet |
Aguirre-Urreta, Maria Beatriz Ramos, Victor Alberto |
author_sort |
Aguirre-Urreta, Maria Beatriz |
title |
Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile |
title_short |
Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile |
title_full |
Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile |
title_fullStr |
Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile |
title_full_unstemmed |
Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile |
title_sort |
ammonoids (crioceratitinae, hauterivian) from the austral basin, chile |
publishDate |
2007 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v44_n2_p387_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00027014_v44_n2_p387_AguirreUrreta |
work_keys_str_mv |
AT aguirreurretamariabeatriz ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile AT ramosvictoralberto ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile |
_version_ |
1768544754921897984 |