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dc.contributor.author
Cataldo, Cecilia Soledad
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dc.date.available
2024-05-27T13:36:45Z
dc.date.issued
2014
dc.identifier.citation
Early Cretaceous gastropods from west-central Argentina: preliminary interpretation of paleobiogeographic affinities; 4th International Palaeontological Congress; Mendoza; Argentina; 2014; 456-456
dc.identifier.uri
http://hdl.handle.net/11336/236084
dc.description.abstract
Previous works on the Cretaceous paleobiogeography of gastropods have focused on the differences between low-latitude and northern mid- to high-latitude associations. This is probably related to a bias of information towards septentrional gastropod faunas that reveals poorly documented austral associations. Besides, the global distribution of gastropods was usually discussed in terms of a three-fold scheme of major paleobiogeographic units originally proposed on the basis of the endemism of bivalve species and the limits of coral-rudist facies. An equivalent model based on Cretaceous gastropods at a global scale has not yet been proposed, although some distinct areas of endemism were recognized for the latest Cretaceous. Over the last years, significant progress has been made in the knowledge of the composition of the marine gastropod fauna from the Lower Cretaceous of the Neuquén Basin. So far, 26 species -belonging to 20 genera and 18 families- were recognized in the Mulichinco (Valanginian) and Agrio (Valanginian-Barremian) formations, and several new records are still under study. Alongside, the palaeoecology and palaeobiogeographic affinities of this fauna were explored for the first time. The main results of the latter topic are presented here. Amongst the studied species, at least nine are endemic to the Neuquén Basin. So far, only three species were also recorded in Chile, and other three seem very close to records from Peru, Venezuela and the Argentinian Austral Basin. Only one species shows records in a very distant region. Despite its endemic elements, at the genus level this association shows a predominantly Tethyan influence. Moreover, the Neuquén Basin shares family-level gastropod taxa with the other basins in the western margin of South America and the Antarctic Peninsula. These results point to a faunistic exchange through open seaways established during the Berriasian-Barremian between the Neuquén Basin and both neighboring-i.e. the western margin of South America and the Antarctic Peninsula-and remote regions-i.e. the Tethys Sea and northern Europe. Also, they are consistent with previous findings, based on the distribution of other benthic and nektonic invertebrates, which claim that the basin stayed connected with the open sea during the Early Cretaceous. The mixed nature of this gastropod association contrasts with the highly provincial Late Cretaceous?Paleocene southern gastropod fauna. In terms of water temperature, the mass occurrence of one nerineoid species could be indicating a brief episode of warmer conditions in the northernmost part of the basin during the late Hauterivian.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Asociación Internacional de Paleontología
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Gastropoda
dc.subject
Early Cretaceous
dc.subject
Argentina
dc.subject
Palaeobiogeography
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Early Cretaceous gastropods from west-central Argentina: preliminary interpretation of paleobiogeographic affinities
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/conferenceObject
dc.type
info:ar-repo/semantics/documento de conferencia
dc.date.updated
2024-04-24T13:41:24Z
dc.journal.pagination
456-456
dc.journal.pais
Argentina
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dc.journal.ciudad
Mendoza
dc.description.fil
Fil: Cataldo, Cecilia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.conicet.rol
Autor
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dc.coverage
Internacional
dc.type.subtype
Congreso
dc.description.nombreEvento
4th International Palaeontological Congress
dc.date.evento
2014-09-28
dc.description.ciudadEvento
Mendoza
dc.description.paisEvento
Argentina
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dc.type.publicacion
Book
dc.description.institucionOrganizadora
Asociación Internacional de Paleontología
dc.source.libro
4th International Palaeontological Congress
dc.date.eventoHasta
2014-10-03
dc.type
Congreso
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