Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina

Four gastropod species are described from dysaerobic biofacies of the lower part of the Agua de la Mula Member of the Agrio Formation, Neuquén Basin: Metacerithium turriculatum (Forbes, 1845), Nerineopsis acutecarinatum (Behrendsen, 1891) and the new species Ampullina pichinka and Mesalia? kushea. T...

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Detalles Bibliográficos
Autores principales: Cataldo, Cecilia Soledad, Lazo, Dario Gustavo
Publicado: 2016
Materias:
Argentina
Biofacies
Dysoxia
Gastropoda
Hauterivian
Neuquén
biofacies
dominance
facies analysis
gastropod
new species
paleoecology
taxonomy
Neuquen Basin
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v57_n_p165_Cataldo
http://hdl.handle.net/20.500.12110/paper_01956671_v57_n_p165_Cataldo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01956671_v57_n_p165_Cataldo
record_format dspace
spelling paper:paper_01956671_v57_n_p165_Cataldo2023-06-08T15:20:19Z Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina Cataldo, Cecilia Soledad Lazo, Dario Gustavo Argentina Biofacies Dysoxia Gastropoda Hauterivian Neuquén biofacies dominance facies analysis gastropod Hauterivian new species paleoecology taxonomy Argentina Neuquen Basin Gastropoda Four gastropod species are described from dysaerobic biofacies of the lower part of the Agua de la Mula Member of the Agrio Formation, Neuquén Basin: Metacerithium turriculatum (Forbes, 1845), Nerineopsis acutecarinatum (Behrendsen, 1891) and the new species Ampullina pichinka and Mesalia? kushea. They were active epifaunals and possibly deposit-feeders and/or browsers, and epifaunal to semi-infaunal possibly suspension- or deposit-feeder in the case of M.? kushea, thriving in soft to firm substrates. These gastropods, together with two aporrhaid species, are the dominant components of a typically small-sized, low-diversity macrobenthic fauna that occurs in dark, organic-rich shales. The facies in which this fauna is recorded are thought to represent a transition from lower to upper outer ramp marine settings, in the context of a second-order TST and early stages of a HST. They record a transition from lower dysoxic conditions in the lowest part of the Agua de la Mula Member to upper dysoxic conditions upwards. Two distinct gastropod biofacies were recognized corresponding to the two identified stages: biofacies A, dominated by Protohemichenopus neuquensis and N. acutecarinatum, more tolerant to dysoxic conditions, and biofacies B, dominated by M. turriculatum and Mesalia? kushea, less tolerant to oxygen deficiency. © 2015 Elsevier Ltd. Fil:Cataldo, C.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lazo, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v57_n_p165_Cataldo http://hdl.handle.net/20.500.12110/paper_01956671_v57_n_p165_Cataldo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Biofacies
Dysoxia
Gastropoda
Hauterivian
Neuquén
biofacies
dominance
facies analysis
gastropod
Hauterivian
new species
paleoecology
taxonomy
Argentina
Neuquen Basin
Gastropoda
spellingShingle Argentina
Biofacies
Dysoxia
Gastropoda
Hauterivian
Neuquén
biofacies
dominance
facies analysis
gastropod
Hauterivian
new species
paleoecology
taxonomy
Argentina
Neuquen Basin
Gastropoda
Cataldo, Cecilia Soledad
Lazo, Dario Gustavo
Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina
topic_facet Argentina
Biofacies
Dysoxia
Gastropoda
Hauterivian
Neuquén
biofacies
dominance
facies analysis
gastropod
Hauterivian
new species
paleoecology
taxonomy
Argentina
Neuquen Basin
Gastropoda
description Four gastropod species are described from dysaerobic biofacies of the lower part of the Agua de la Mula Member of the Agrio Formation, Neuquén Basin: Metacerithium turriculatum (Forbes, 1845), Nerineopsis acutecarinatum (Behrendsen, 1891) and the new species Ampullina pichinka and Mesalia? kushea. They were active epifaunals and possibly deposit-feeders and/or browsers, and epifaunal to semi-infaunal possibly suspension- or deposit-feeder in the case of M.? kushea, thriving in soft to firm substrates. These gastropods, together with two aporrhaid species, are the dominant components of a typically small-sized, low-diversity macrobenthic fauna that occurs in dark, organic-rich shales. The facies in which this fauna is recorded are thought to represent a transition from lower to upper outer ramp marine settings, in the context of a second-order TST and early stages of a HST. They record a transition from lower dysoxic conditions in the lowest part of the Agua de la Mula Member to upper dysoxic conditions upwards. Two distinct gastropod biofacies were recognized corresponding to the two identified stages: biofacies A, dominated by Protohemichenopus neuquensis and N. acutecarinatum, more tolerant to dysoxic conditions, and biofacies B, dominated by M. turriculatum and Mesalia? kushea, less tolerant to oxygen deficiency. © 2015 Elsevier Ltd.
author Cataldo, Cecilia Soledad
Lazo, Dario Gustavo
author_facet Cataldo, Cecilia Soledad
Lazo, Dario Gustavo
author_sort Cataldo, Cecilia Soledad
title Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina
title_short Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina
title_full Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina
title_fullStr Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina
title_full_unstemmed Taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the Lower Cretaceous Agrio Formation, Neuquén Basin, west-central Argentina
title_sort taxonomy and paleoecology of a new gastropod fauna from dysoxic outer ramp facies of the lower cretaceous agrio formation, neuquén basin, west-central argentina
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v57_n_p165_Cataldo
http://hdl.handle.net/20.500.12110/paper_01956671_v57_n_p165_Cataldo
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AT lazodariogustavo taxonomyandpaleoecologyofanewgastropodfaunafromdysoxicouterrampfaciesofthelowercretaceousagrioformationneuquenbasinwestcentralargentina
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