Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications

We present a new species of Steinmanella Crickmay from the Valanginian of the Neuquén Basin, west-central Argentina, and at the same time update a Valanginian-earliest Barremian bivalve zonation which is integrated into the local, Chilean and European standard ammonoid zonations. Steinmanella caicay...

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Detalles Bibliográficos
Autores principales: Lazo, D.G., Luci, L.
Formato: JOUR
Materias:
Agrio Formation
Biostratigraphy
Steinmanella
Trigonioida
Valanginian
biostratigraphy
biozonation
bivalve
new species
shell
taxonomy
Argentina
Neuquen Basin
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01956671_v45_n_p60_Lazo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01956671_v45_n_p60_Lazo2023-10-03T15:09:31Z Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications Lazo, D.G. Luci, L. Agrio Formation Biostratigraphy Steinmanella Trigonioida Valanginian biostratigraphy biozonation bivalve new species shell taxonomy Valanginian Argentina Neuquen Basin We present a new species of Steinmanella Crickmay from the Valanginian of the Neuquén Basin, west-central Argentina, and at the same time update a Valanginian-earliest Barremian bivalve zonation which is integrated into the local, Chilean and European standard ammonoid zonations. Steinmanella caicayensis sp. nov. presents a moderately inflated shell, a subtriangular outline, well-developed carinaeand a straight to moderately convex anterior margin. Steinmanella is very abundant in the Tithonian-Barremian interval in the basin and thus provides an ideal opportunity to perform detailed taxonomic and stratigraphic studies; a former zonation based on these trigonioids is here revised and expanded with a thorough revision of Valanginian occurrences based on new material. Two new zones are proposed, namely the S.quintucoensis and S.caicayensis zones, encompassing Valanginian times. The proposed bivalve zonation encompassing the Valanginian-earliest Barremian time interval can be useful in correlating with other southwestern Gondwanan regions, such as Perú, Chile, South Africa, Tanzania, and India, where Steinmanella has been recorded. © 2013 Elsevier Ltd. Fil:Lazo, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Luci, L. 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_01956671_v45_n_p60_Lazo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Agrio Formation
Biostratigraphy
Steinmanella
Trigonioida
Valanginian
biostratigraphy
biozonation
bivalve
new species
shell
taxonomy
Valanginian
Argentina
Neuquen Basin
spellingShingle Agrio Formation
Biostratigraphy
Steinmanella
Trigonioida
Valanginian
biostratigraphy
biozonation
bivalve
new species
shell
taxonomy
Valanginian
Argentina
Neuquen Basin
Lazo, D.G.
Luci, L.
Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications
topic_facet Agrio Formation
Biostratigraphy
Steinmanella
Trigonioida
Valanginian
biostratigraphy
biozonation
bivalve
new species
shell
taxonomy
Valanginian
Argentina
Neuquen Basin
description We present a new species of Steinmanella Crickmay from the Valanginian of the Neuquén Basin, west-central Argentina, and at the same time update a Valanginian-earliest Barremian bivalve zonation which is integrated into the local, Chilean and European standard ammonoid zonations. Steinmanella caicayensis sp. nov. presents a moderately inflated shell, a subtriangular outline, well-developed carinaeand a straight to moderately convex anterior margin. Steinmanella is very abundant in the Tithonian-Barremian interval in the basin and thus provides an ideal opportunity to perform detailed taxonomic and stratigraphic studies; a former zonation based on these trigonioids is here revised and expanded with a thorough revision of Valanginian occurrences based on new material. Two new zones are proposed, namely the S.quintucoensis and S.caicayensis zones, encompassing Valanginian times. The proposed bivalve zonation encompassing the Valanginian-earliest Barremian time interval can be useful in correlating with other southwestern Gondwanan regions, such as Perú, Chile, South Africa, Tanzania, and India, where Steinmanella has been recorded. © 2013 Elsevier Ltd.
format JOUR
author Lazo, D.G.
Luci, L.
author_facet Lazo, D.G.
Luci, L.
author_sort Lazo, D.G.
title Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications
title_short Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications
title_full Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications
title_fullStr Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications
title_full_unstemmed Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications
title_sort revision of valanginian steinmanellinae bivalves from the neuquén basin, west-central argentina, and their biostratigraphic implications
url http://hdl.handle.net/20.500.12110/paper_01956671_v45_n_p60_Lazo
work_keys_str_mv AT lazodg revisionofvalanginiansteinmanellinaebivalvesfromtheneuquenbasinwestcentralargentinaandtheirbiostratigraphicimplications
AT lucil revisionofvalanginiansteinmanellinaebivalvesfromtheneuquenbasinwestcentralargentinaandtheirbiostratigraphicimplications
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