Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina

Two species of decapod crustacean are recorded from the Agua de la Mula Member of the Agrio Formation (Upper Hauterivian - Lower Barremian) of the Neuquén Basin of west-central Argentina, namely Astacodes falcifer Bell and a new species of Palaeohomarus, P. pacificus. The preservation of the specime...

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Autores principales: Aguirre-Urreta, B., Lazo, D.G., Rawson, P.F.
Formato: JOUR
Materias:
Argentina
Crustacea
Exceptional preservation
Eyes
Lower Cretaceous
Stridulatory structure
Cretaceous
crustacean
fossil
geographical distribution
lobster
marine environment
new species
paleogeography
Neuquen Basin
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00310239_v55_n5_p1091_AguirreUrreta
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00310239_v55_n5_p1091_AguirreUrreta
record_format dspace
spelling todo:paper_00310239_v55_n5_p1091_AguirreUrreta2023-10-03T14:41:09Z Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina Aguirre-Urreta, B. Lazo, D.G. Rawson, P.F. Argentina Crustacea Exceptional preservation Eyes Lower Cretaceous Stridulatory structure Cretaceous crustacean fossil geographical distribution lobster marine environment new species paleogeography Argentina Neuquen Basin Crustacea Two species of decapod crustacean are recorded from the Agua de la Mula Member of the Agrio Formation (Upper Hauterivian - Lower Barremian) of the Neuquén Basin of west-central Argentina, namely Astacodes falcifer Bell and a new species of Palaeohomarus, P. pacificus. The preservation of the specimens is exceptional, some showing delicate compound eyes and a stridulatory apparatus, features rarely found in fossil forms. Many specimens are preserved articulated inside calcareous nodules, within dark-grey shales. The lobster-bearing sediments accumulated in a low-energy marine environment and diagenetic mineralization occurred very rapidly, prior to significant decay, thus allowing exceptional preservation of specimens. Palaeohomarus was a rare genus in the Cretaceous with a palaeogeographic distribution restricted to the Mediterranean Tethys, the eastern USA and Madagascar, while Astacodes falcifer has been recorded only from Speeton (eastern England) and Neuquén. © The Palaeontological Association. Fil:Aguirre-Urreta, B. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00310239_v55_n5_p1091_AguirreUrreta
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
Crustacea
Exceptional preservation
Eyes
Lower Cretaceous
Stridulatory structure
Cretaceous
crustacean
fossil
geographical distribution
lobster
marine environment
new species
paleogeography
Argentina
Neuquen Basin
Crustacea
spellingShingle Argentina
Crustacea
Exceptional preservation
Eyes
Lower Cretaceous
Stridulatory structure
Cretaceous
crustacean
fossil
geographical distribution
lobster
marine environment
new species
paleogeography
Argentina
Neuquen Basin
Crustacea
Aguirre-Urreta, B.
Lazo, D.G.
Rawson, P.F.
Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina
topic_facet Argentina
Crustacea
Exceptional preservation
Eyes
Lower Cretaceous
Stridulatory structure
Cretaceous
crustacean
fossil
geographical distribution
lobster
marine environment
new species
paleogeography
Argentina
Neuquen Basin
Crustacea
description Two species of decapod crustacean are recorded from the Agua de la Mula Member of the Agrio Formation (Upper Hauterivian - Lower Barremian) of the Neuquén Basin of west-central Argentina, namely Astacodes falcifer Bell and a new species of Palaeohomarus, P. pacificus. The preservation of the specimens is exceptional, some showing delicate compound eyes and a stridulatory apparatus, features rarely found in fossil forms. Many specimens are preserved articulated inside calcareous nodules, within dark-grey shales. The lobster-bearing sediments accumulated in a low-energy marine environment and diagenetic mineralization occurred very rapidly, prior to significant decay, thus allowing exceptional preservation of specimens. Palaeohomarus was a rare genus in the Cretaceous with a palaeogeographic distribution restricted to the Mediterranean Tethys, the eastern USA and Madagascar, while Astacodes falcifer has been recorded only from Speeton (eastern England) and Neuquén. © The Palaeontological Association.
format JOUR
author Aguirre-Urreta, B.
Lazo, D.G.
Rawson, P.F.
author_facet Aguirre-Urreta, B.
Lazo, D.G.
Rawson, P.F.
author_sort Aguirre-Urreta, B.
title Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina
title_short Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina
title_full Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina
title_fullStr Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina
title_full_unstemmed Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina
title_sort decapod crustacea from the agrio formation (lower cretaceous) of the neuquén basin, argentina
url http://hdl.handle.net/20.500.12110/paper_00310239_v55_n5_p1091_AguirreUrreta
work_keys_str_mv AT aguirreurretab decapodcrustaceafromtheagrioformationlowercretaceousoftheneuquenbasinargentina
AT lazodg decapodcrustaceafromtheagrioformationlowercretaceousoftheneuquenbasinargentina
AT rawsonpf decapodcrustaceafromtheagrioformationlowercretaceousoftheneuquenbasinargentina
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