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, S., Del Río, C.J., Concheyro, A.
Formato: JOUR
Materias:
Argentina
Danian
Echinoidea
New species
Patagonia
Roca formation
Echinoida
Hemiaster
Holasteroida
Paraster
Acceso en línea: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 todo:paper_00777749_v261_n2_p165_Martinez
record_format dspace
spelling todo:paper_00777749_v261_n2_p165_Martinez2023-10-03T14:54:15Z Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina Martínez, S. Del Río, C.J. Concheyro, A. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, S.
Del Río, C.J.
Concheyro, A.
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.
format JOUR
author Martínez, S.
Del Río, C.J.
Concheyro, A.
author_facet Martínez, S.
Del Río, C.J.
Concheyro, A.
author_sort Martínez, S.
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
url http://hdl.handle.net/20.500.12110/paper_00777749_v261_n2_p165_Martinez
work_keys_str_mv AT martinezs danianearlypaleoceneechinoidsfromtherocaformationnorthernpatagoniaargentina
AT delriocj danianearlypaleoceneechinoidsfromtherocaformationnorthernpatagoniaargentina
AT concheyroa danianearlypaleoceneechinoidsfromtherocaformationnorthernpatagoniaargentina
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