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...
Guardado en:
Autores principales: | , |
---|---|
Publicado: |
2013
|
Materias: | |
Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v45_n_p60_Lazo http://hdl.handle.net/20.500.12110/paper_01956671_v45_n_p60_Lazo |
Aporte de: |
id |
paper:paper_01956671_v45_n_p60_Lazo |
---|---|
record_format |
dspace |
spelling |
paper:paper_01956671_v45_n_p60_Lazo2023-06-08T15:20:17Z Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications Lazo, Dario Gustavo Luci, Leticia 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. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v45_n_p60_Lazo 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, Dario Gustavo Luci, Leticia 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. |
author |
Lazo, Dario Gustavo Luci, Leticia |
author_facet |
Lazo, Dario Gustavo Luci, Leticia |
author_sort |
Lazo, Dario Gustavo |
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 |
publishDate |
2013 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v45_n_p60_Lazo http://hdl.handle.net/20.500.12110/paper_01956671_v45_n_p60_Lazo |
work_keys_str_mv |
AT lazodariogustavo revisionofvalanginiansteinmanellinaebivalvesfromtheneuquenbasinwestcentralargentinaandtheirbiostratigraphicimplications AT lucileticia revisionofvalanginiansteinmanellinaebivalvesfromtheneuquenbasinwestcentralargentinaandtheirbiostratigraphicimplications |
_version_ |
1768543942270255104 |