Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina

Stratigraphically well-constrained echinoids from the Roca Formation in the province of Rio Negro (Patagonia, Argentina) are analysed in detail. The poorly known Linthia? joannisboehmi OPPENHEIM in BÖHM, 1903, recently reassigned to Paraster, is demonstrated to comprise in fact two distinct species,...

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Detalles Bibliográficos
Autores principales:	Martínez Chiappara, Sergio Agustín, Del Río, Claudia, Concheyro, Graciela Andrea
Publicado:	2011
Materias:	Argentina Danian Echinoidea New species Patagonia Roca formation Echinoida Hemiaster Holasteroida Paraster
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00777749_v261_n2_p165_Martinez http://hdl.handle.net/20.500.12110/paper_00777749_v261_n2_p165_Martinez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00777749_v261_n2_p165_Martinez
record_format	dspace
spelling	paper:paper_00777749_v261_n2_p165_Martinez2023-06-08T15:07:25Z Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina Martínez Chiappara, Sergio Agustín Del Río, Claudia Concheyro, Graciela Andrea Argentina Danian Echinoidea New species Patagonia Roca formation Echinoida Echinoidea Hemiaster Holasteroida Paraster Stratigraphically well-constrained echinoids from the Roca Formation in the province of Rio Negro (Patagonia, Argentina) are analysed in detail. The poorly known Linthia? joannisboehmi OPPENHEIM in BÖHM, 1903, recently reassigned to Paraster, is demonstrated to comprise in fact two distinct species, Linthia? joannisboehmi and Linthia parmae n. sp. In addition, specifically indeterminate species of Plesiaster and Hemiaster and a basal holasteroid are recorded. The analyses of calcareous nannofossil assemblages of the echinoid-bearing strata document their early Paleocene (Danian) age, which has an impact on patterns of survivorship across the K/Pg boundary. © 2011 E. Schweizerbart'sche Verlagsbuchhandlung Stuttgart Germany. Fil:Martínez, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Del Río, C.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Concheyro, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00777749_v261_n2_p165_Martinez http://hdl.handle.net/20.500.12110/paper_00777749_v261_n2_p165_Martinez
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 Danian Echinoidea New species Patagonia Roca formation Echinoida Echinoidea Hemiaster Holasteroida Paraster
spellingShingle	Argentina Danian Echinoidea New species Patagonia Roca formation Echinoida Echinoidea Hemiaster Holasteroida Paraster Martínez Chiappara, Sergio Agustín Del Río, Claudia Concheyro, Graciela Andrea Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina
topic_facet	Argentina Danian Echinoidea New species Patagonia Roca formation Echinoida Echinoidea Hemiaster Holasteroida Paraster
description	Stratigraphically well-constrained echinoids from the Roca Formation in the province of Rio Negro (Patagonia, Argentina) are analysed in detail. The poorly known Linthia? joannisboehmi OPPENHEIM in BÖHM, 1903, recently reassigned to Paraster, is demonstrated to comprise in fact two distinct species, Linthia? joannisboehmi and Linthia parmae n. sp. In addition, specifically indeterminate species of Plesiaster and Hemiaster and a basal holasteroid are recorded. The analyses of calcareous nannofossil assemblages of the echinoid-bearing strata document their early Paleocene (Danian) age, which has an impact on patterns of survivorship across the K/Pg boundary. © 2011 E. Schweizerbart'sche Verlagsbuchhandlung Stuttgart Germany.
author	Martínez Chiappara, Sergio Agustín Del Río, Claudia Concheyro, Graciela Andrea
author_facet	Martínez Chiappara, Sergio Agustín Del Río, Claudia Concheyro, Graciela Andrea
author_sort	Martínez Chiappara, Sergio Agustín
title	Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina
title_short	Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina
title_full	Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina
title_fullStr	Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina
title_full_unstemmed	Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina
title_sort	danian (early paleocene) echinoids from the roca formation, northern patagonia, argentina
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00777749_v261_n2_p165_Martinez http://hdl.handle.net/20.500.12110/paper_00777749_v261_n2_p165_Martinez
work_keys_str_mv	AT martinezchiapparasergioagustin danianearlypaleoceneechinoidsfromtherocaformationnorthernpatagoniaargentina AT delrioclaudia danianearlypaleoceneechinoidsfromtherocaformationnorthernpatagoniaargentina AT concheyrogracielaandrea danianearlypaleoceneechinoidsfromtherocaformationnorthernpatagoniaargentina
_version_	1768544544991739904

Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina

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