Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle

Aetostreon pilmatuegrossum sp. nov., a large and very convex ostreid from the Pilmatué Member of the Agrio Formation (Neuquén Basin, Argentina), is described based on specimens recovered from upper Valanginian beds of the Pseudofavrella angulatiformis and Neocomites sp. ammonite subzones. This work...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rubilar, A.E., Lazo, D.G.
Formato: JOUR
Materias:
Aetostreon
Argentina
Lower Cretaceous
Neuquén Basin
Ostreoidea
Taxonomy
anatomy
Cretaceous
developmental stage
growth
mollusc
morphology
species occurrence
taxonomy
Africa
Neuquen Basin
South Africa
South America
Southern Africa
Sub-Saharan Africa
Ammonoidea
Ostreidae
Pseudofavrella angulatiformis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01956671_v30_n3_p727_Rubilar
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01956671_v30_n3_p727_Rubilar
record_format dspace
spelling todo:paper_01956671_v30_n3_p727_Rubilar2023-10-03T15:09:24Z Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle Rubilar, A.E. Lazo, D.G. Aetostreon Argentina Lower Cretaceous Neuquén Basin Ostreoidea Taxonomy anatomy Cretaceous developmental stage growth mollusc morphology species occurrence taxonomy Africa Argentina Neuquen Basin South Africa South America Southern Africa Sub-Saharan Africa Ammonoidea Ostreidae Ostreoidea Pseudofavrella angulatiformis Aetostreon pilmatuegrossum sp. nov., a large and very convex ostreid from the Pilmatué Member of the Agrio Formation (Neuquén Basin, Argentina), is described based on specimens recovered from upper Valanginian beds of the Pseudofavrella angulatiformis and Neocomites sp. ammonite subzones. This work also includes a general morphologic discussion of the well-known Lower Cretaceous oysters from Europe, Asia and Africa, most of them considered synonymous of Aetostreon latissimum (Lamarck) in the last decades. The left valves of these oysters share a set of morphological characters that seems to respond to a very distinct but conservative anatomical pattern inherited from their direct ancestor, instead of evidence for their taxonomic uniformity at the species level. Specifically, they show differences in several characters and/or their degree of development and co-occurrence in a particular growth stage, which probably have systematic value, as in the species here described. Aetostreon pilmatuegrossum sp. nov. is probable closely related to an undescribed lower Valanginian species recorded in the Chachao Formation of the Neuquén Basin, and also has affinities with an association of Barremian oysters from South Africa that seems to be its direct descendant. © 2009 Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01956671_v30_n3_p727_Rubilar
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Aetostreon
Argentina
Lower Cretaceous
Neuquén Basin
Ostreoidea
Taxonomy
anatomy
Cretaceous
developmental stage
growth
mollusc
morphology
species occurrence
taxonomy
Africa
Argentina
Neuquen Basin
South Africa
South America
Southern Africa
Sub-Saharan Africa
Ammonoidea
Ostreidae
Ostreoidea
Pseudofavrella angulatiformis
spellingShingle Aetostreon
Argentina
Lower Cretaceous
Neuquén Basin
Ostreoidea
Taxonomy
anatomy
Cretaceous
developmental stage
growth
mollusc
morphology
species occurrence
taxonomy
Africa
Argentina
Neuquen Basin
South Africa
South America
Southern Africa
Sub-Saharan Africa
Ammonoidea
Ostreidae
Ostreoidea
Pseudofavrella angulatiformis
Rubilar, A.E.
Lazo, D.G.
Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle
topic_facet Aetostreon
Argentina
Lower Cretaceous
Neuquén Basin
Ostreoidea
Taxonomy
anatomy
Cretaceous
developmental stage
growth
mollusc
morphology
species occurrence
taxonomy
Africa
Argentina
Neuquen Basin
South Africa
South America
Southern Africa
Sub-Saharan Africa
Ammonoidea
Ostreidae
Ostreoidea
Pseudofavrella angulatiformis
description Aetostreon pilmatuegrossum sp. nov., a large and very convex ostreid from the Pilmatué Member of the Agrio Formation (Neuquén Basin, Argentina), is described based on specimens recovered from upper Valanginian beds of the Pseudofavrella angulatiformis and Neocomites sp. ammonite subzones. This work also includes a general morphologic discussion of the well-known Lower Cretaceous oysters from Europe, Asia and Africa, most of them considered synonymous of Aetostreon latissimum (Lamarck) in the last decades. The left valves of these oysters share a set of morphological characters that seems to respond to a very distinct but conservative anatomical pattern inherited from their direct ancestor, instead of evidence for their taxonomic uniformity at the species level. Specifically, they show differences in several characters and/or their degree of development and co-occurrence in a particular growth stage, which probably have systematic value, as in the species here described. Aetostreon pilmatuegrossum sp. nov. is probable closely related to an undescribed lower Valanginian species recorded in the Chachao Formation of the Neuquén Basin, and also has affinities with an association of Barremian oysters from South Africa that seems to be its direct descendant. © 2009 Elsevier Ltd. All rights reserved.
format JOUR
author Rubilar, A.E.
Lazo, D.G.
author_facet Rubilar, A.E.
Lazo, D.G.
author_sort Rubilar, A.E.
title Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle
title_short Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle
title_full Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle
title_fullStr Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle
title_full_unstemmed Description of Aetostreon pilmatuegrossum sp. nov. from the Lower Cretaceous of Argentina (Neuquén Basin), and significance of the conservative left valve morphology in oysters of the genus Aetostreon Bayle
title_sort description of aetostreon pilmatuegrossum sp. nov. from the lower cretaceous of argentina (neuquén basin), and significance of the conservative left valve morphology in oysters of the genus aetostreon bayle
url http://hdl.handle.net/20.500.12110/paper_01956671_v30_n3_p727_Rubilar
work_keys_str_mv AT rubilarae descriptionofaetostreonpilmatuegrossumspnovfromthelowercretaceousofargentinaneuquenbasinandsignificanceoftheconservativeleftvalvemorphologyinoystersofthegenusaetostreonbayle
AT lazodg descriptionofaetostreonpilmatuegrossumspnovfromthelowercretaceousofargentinaneuquenbasinandsignificanceoftheconservativeleftvalvemorphologyinoystersofthegenusaetostreonbayle
_version_ 1782028140127715328

Ejemplares similares