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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Detalles Bibliográficos
Autores principales: Aguirre-Urreta, B., Suárez, M., De La Cruz, R., Ramos, V.A.
Formato: JOUR
Materias:
Ammonoids
Austral Basin
Chile
Crioceratitinae
Hauterivian
ammonite
Boreal
endemic species
fossil record
sea level change
species diversity
taxonomy
Patagonia
South America
Ammonoidea
Ancyloceratidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00027014_v44_n2_p387_AguirreUrreta
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00027014_v44_n2_p387_AguirreUrreta
record_format dspace
spelling 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
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AT suarezm ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile
AT delacruzr ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile
AT ramosva ammonoidscrioceratitinaehauterivianfromtheaustralbasinchile
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