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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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310239_v55_n5_p1091_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00310239_v55_n5_p1091_AguirreUrreta |
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paper:paper_00310239_v55_n5_p1091_AguirreUrreta2023-06-08T14:56:52Z Decapod Crustacea from the Agrio Formation (Lower Cretaceous) of the Neuquén Basin, Argentina Aguirre-Urreta, Maria Beatriz Lazo, Dario Gustavo 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310239_v55_n5_p1091_AguirreUrreta 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, Maria Beatriz Lazo, Dario Gustavo 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. |
| author |
Aguirre-Urreta, Maria Beatriz Lazo, Dario Gustavo |
| author_facet |
Aguirre-Urreta, Maria Beatriz Lazo, Dario Gustavo |
| author_sort |
Aguirre-Urreta, Maria Beatriz |
| 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 |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00310239_v55_n5_p1091_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00310239_v55_n5_p1091_AguirreUrreta |
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AT aguirreurretamariabeatriz decapodcrustaceafromtheagrioformationlowercretaceousoftheneuquenbasinargentina AT lazodariogustavo decapodcrustaceafromtheagrioformationlowercretaceousoftheneuquenbasinargentina |
| _version_ |
1768546149674778624 |