Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina

The study of Paleogene mammals of intermediate and low latitudes has increased in the last decades and has been clearly demonstrated their importance in the comprehension of the evolution and faunistic changes outside Patagonia. The study of these faunas permits establishing new comparisons among co...

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Autores principales: Ciancio, Martín Ricardo, Herrera, Claudia M., Aramayo, Alejandro, Payrola, Patricia, Babot, Judith
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Paleontología
Central Andean Puna
Cingulata
Dasypodidae
Eocene
Mammalia
Palaeogene
South America
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86297
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86297
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Central Andean Puna
Cingulata
Dasypodidae
Eocene
Mammalia
Palaeogene
South America
spellingShingle Paleontología
Central Andean Puna
Cingulata
Dasypodidae
Eocene
Mammalia
Palaeogene
South America
Ciancio, Martín Ricardo
Herrera, Claudia M.
Aramayo, Alejandro
Payrola, Patricia
Babot, Judith
Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina
topic_facet Paleontología
Central Andean Puna
Cingulata
Dasypodidae
Eocene
Mammalia
Palaeogene
South America
description The study of Paleogene mammals of intermediate and low latitudes has increased in the last decades and has been clearly demonstrated their importance in the comprehension of the evolution and faunistic changes outside Patagonia. The study of these faunas permits establishing new comparisons among contemporaneous faunistic associations, completing the distributional patterns, and evaluating evolutionary changes in the lineages in relation to climatic conditions prevailing in each of the different regions. In this work we study the diversity of Dasypodidae recovered from the Geste Formation (Northwestern Argentina). Bearing levels of Geste Formation were referred alternatively to a Barrancan subage of Casamayoran SALMA (middle Eocene, Lutetian-Bartonian) or a Mustersan SALMA (middle-late Eocene, Bartonian-Priabonian) on faunistic comparations with their equivalent in Patagonia, although absolute isotopic data indicates ca. 37-35 Ma (late Eocene, Priabonian). We described the following taxa of Dasypodidae: (i) Dasypodinae Astegotheriini: cf. Astegotherium sp., ?Prostegotherium sp., Parastegosimpsonia cf. P. peruana; (ii) Dasypodinae indet.; (iii) Euphractinae Euphractini: Parutaetus punaensis sp. nov.; (iv) Dasypodidae incertae sedis: Pucatherium parvum, Punatherium catamarcensis gen. et sp. nov. In comparison with other beds bearing Eocene cingulate faunas from Northwestern Argentina, Geste Formation presents the greatest diversity of dasypodids. This association is consistent with a late Eocene age and shows a taxonomic and biogeographic relevant features given by a unique specific composition: (i) it differs from that known for contemporaneous faunas from Southern latitudes and younger associations from more tropical areas; (ii) it includes genera with close affinities to those distant areas; (iii) it presents unique taxa typical from Eocene units exposed at Northwestern Argentina. This highlights the evolutionary and biogeographic meaning of the cingulate of the Geste Formation and supports the idea that the faunistic regionalization probably obeyed to latitudinal than to temporal factors.
format Articulo
Articulo
author Ciancio, Martín Ricardo
Herrera, Claudia M.
Aramayo, Alejandro
Payrola, Patricia
Babot, Judith
author_facet Ciancio, Martín Ricardo
Herrera, Claudia M.
Aramayo, Alejandro
Payrola, Patricia
Babot, Judith
author_sort Ciancio, Martín Ricardo
title Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina
title_short Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina
title_full Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina
title_fullStr Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina
title_full_unstemmed Diversity of cingulate xenarthrans in the middle-late Eocene of Northwestern Argentina
title_sort diversity of cingulate xenarthrans in the middle-late eocene of northwestern argentina
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/86297
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