Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications

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As a result of a microfacial study in the outer and middle ramp deposits of the Vaca Muerta Formation (lower Tithonian-upper Valanginian), four ichnotaxa of crustacean microcoprolites are described: Palaxius azulensis Kietzmann isp. nov., Palaxius caracuraensis Kietzmann isp. nov., Helicerina? isp....

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Detalles Bibliográficos
Autores principales: Kietzmann, D.A., Blau, J., Fernández, D.E., Palma, R.M.
Formato: JOUR
Materias:
Argentina
Crustacean microcoprolites
Helicerina
Jurassic-Cretaceous
Neuquén Basin
Palaxius
Vaca Muerta Formation
biostratigraphy
coprolite
crustacean
dominance
fossil assemblage
Jurassic-Cretaceous boundary
new record
taxonomy
Neuquen Basin
Callianassidae
Crustacea
Erymidae
Mecochiridae
Nephropidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05677920_v55_n2_p277_Kietzmann
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_05677920_v55_n2_p277_Kietzmann
record_format dspace
spelling todo:paper_05677920_v55_n2_p277_Kietzmann2023-10-03T15:35:57Z Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications Kietzmann, D.A. Blau, J. Fernández, D.E. Palma, R.M. Argentina Crustacean microcoprolites Helicerina Jurassic-Cretaceous Neuquén Basin Palaxius Vaca Muerta Formation biostratigraphy coprolite crustacean dominance fossil assemblage Jurassic-Cretaceous boundary new record taxonomy Argentina Neuquen Basin Callianassidae Crustacea Erymidae Mecochiridae Nephropidae As a result of a microfacial study in the outer and middle ramp deposits of the Vaca Muerta Formation (lower Tithonian-upper Valanginian), four ichnotaxa of crustacean microcoprolites are described: Palaxius azulensis Kietzmann isp. nov., Palaxius caracuraensis Kietzmann isp. nov., Helicerina? isp. A. aff. Helicerina siciliana and Helicerina isp. B. They represent one of the first records of crustacean microcoprolites for the Neuqun Basin and Argentina. Helicerina is reported for the first time from the Upper Jurassic and Lower Cretaceous of South America. It is inferred that Palaxius ichnospecies were produced by callianassids, while Helicerina ichnospecies could be produced by decapods of Mecochiridae, Erymidae, and/or Nephropidae affinity. Two assemblages of crustacean microcoprolites are recognised, a middle Tithonian to lower Berriasian Palaxius-dominated assemblage and an early to late Valanginian Helicerina-dominated assemblage. Fil:Kietzmann, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fernández, D.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Palma, R.M. 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_05677920_v55_n2_p277_Kietzmann
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
Crustacean microcoprolites
Helicerina
Jurassic-Cretaceous
Neuquén Basin
Palaxius
Vaca Muerta Formation
biostratigraphy
coprolite
crustacean
dominance
fossil assemblage
Jurassic-Cretaceous boundary
new record
taxonomy
Argentina
Neuquen Basin
Callianassidae
Crustacea
Erymidae
Mecochiridae
Nephropidae
spellingShingle Argentina
Crustacean microcoprolites
Helicerina
Jurassic-Cretaceous
Neuquén Basin
Palaxius
Vaca Muerta Formation
biostratigraphy
coprolite
crustacean
dominance
fossil assemblage
Jurassic-Cretaceous boundary
new record
taxonomy
Argentina
Neuquen Basin
Callianassidae
Crustacea
Erymidae
Mecochiridae
Nephropidae
Kietzmann, D.A.
Blau, J.
Fernández, D.E.
Palma, R.M.
Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications
topic_facet Argentina
Crustacean microcoprolites
Helicerina
Jurassic-Cretaceous
Neuquén Basin
Palaxius
Vaca Muerta Formation
biostratigraphy
coprolite
crustacean
dominance
fossil assemblage
Jurassic-Cretaceous boundary
new record
taxonomy
Argentina
Neuquen Basin
Callianassidae
Crustacea
Erymidae
Mecochiridae
Nephropidae
description As a result of a microfacial study in the outer and middle ramp deposits of the Vaca Muerta Formation (lower Tithonian-upper Valanginian), four ichnotaxa of crustacean microcoprolites are described: Palaxius azulensis Kietzmann isp. nov., Palaxius caracuraensis Kietzmann isp. nov., Helicerina? isp. A. aff. Helicerina siciliana and Helicerina isp. B. They represent one of the first records of crustacean microcoprolites for the Neuqun Basin and Argentina. Helicerina is reported for the first time from the Upper Jurassic and Lower Cretaceous of South America. It is inferred that Palaxius ichnospecies were produced by callianassids, while Helicerina ichnospecies could be produced by decapods of Mecochiridae, Erymidae, and/or Nephropidae affinity. Two assemblages of crustacean microcoprolites are recognised, a middle Tithonian to lower Berriasian Palaxius-dominated assemblage and an early to late Valanginian Helicerina-dominated assemblage.
format JOUR
author Kietzmann, D.A.
Blau, J.
Fernández, D.E.
Palma, R.M.
author_facet Kietzmann, D.A.
Blau, J.
Fernández, D.E.
Palma, R.M.
author_sort Kietzmann, D.A.
title Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications
title_short Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications
title_full Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications
title_fullStr Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications
title_full_unstemmed Crustacean microcoprolites from the Upper Jurassic-lower cretaceous of the Neuqun Basin, Argentina: Systematics and biostratigraphic implications
title_sort crustacean microcoprolites from the upper jurassic-lower cretaceous of the neuqun basin, argentina: systematics and biostratigraphic implications
url http://hdl.handle.net/20.500.12110/paper_05677920_v55_n2_p277_Kietzmann
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