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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todo:paper_00027014_v44_n2_p387_AguirreUrreta2023-10-03T13:53:01Z Ammonoids (Crioceratitinae, Hauterivian) from the Austral Basin, Chile Aguirre-Urreta, B. Suárez, M. De La Cruz, R. Ramos, V.A. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, B. Suárez, M. De La Cruz, R. Ramos, V.A. 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. |
format |
JOUR |
author |
Aguirre-Urreta, B. Suárez, M. De La Cruz, R. Ramos, V.A. |
author_facet |
Aguirre-Urreta, B. Suárez, M. De La Cruz, R. Ramos, V.A. |
author_sort |
Aguirre-Urreta, B. |
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 |
url |
http://hdl.handle.net/20.500.12110/paper_00027014_v44_n2_p387_AguirreUrreta |
work_keys_str_mv |
AT aguirreurretab ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile AT suarezm ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile AT delacruzr ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile AT ramosva ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile |
_version_ |
1782027369208348672 |