A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru

A previously undescribed tooth from the Muani Formation at the Laguna Umayo locality, Peru, represents the new didolodontid Umayodus raimondi gen. et sp. nov., here diagnosed by the presence of a well developed metastylid and ectostylid, and a twinned hypoconulid. This taxon is closely related to th...

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Detalles Bibliográficos
Autores principales: Gelfo, Javier Nicolás, Sigé, Bernard
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Paleontología
Austral Kingdom
Condylarthra
Didolodontidae
Eocene
Mammalia
Paleocene
Peru
South America
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84217
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84217
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Austral Kingdom
Condylarthra
Didolodontidae
Eocene
Mammalia
Paleocene
Peru
South America
spellingShingle Paleontología
Austral Kingdom
Condylarthra
Didolodontidae
Eocene
Mammalia
Paleocene
Peru
South America
Gelfo, Javier Nicolás
Sigé, Bernard
A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru
topic_facet Paleontología
Austral Kingdom
Condylarthra
Didolodontidae
Eocene
Mammalia
Paleocene
Peru
South America
description A previously undescribed tooth from the Muani Formation at the Laguna Umayo locality, Peru, represents the new didolodontid Umayodus raimondi gen. et sp. nov., here diagnosed by the presence of a well developed metastylid and ectostylid, and a twinned hypoconulid. This taxon is closely related to the middle Paleocene genera Escribania and Raulvaccia from the locality of Punta Peligro in Patagonia, Argentina. Phylogenetic analysis here performed indicates that they constitute a monophyletic group within Didolodontidae, supported by five derived characters: the hypocone well developed and close to the protocone; the strongly concave precingulum; the contact between the postcristid and the entoconid; the contact of the crista pre-paraconular, precingulum and parastyle; and the mesiodistal enlargement of the m3 talonid. Their paleogeographic distribution fit with those of the actual Andean Region of the Austral Kingdom. The previously assumed ThanetianYpresian age assignment for the Laguna Umayo LU3 fauna is here reinforced by faunistic comparisons with the earliest Eocene Murgon fauna, in Australia, and the Itaboraian South American Land Mammal Age, represented from faunas of Patagonia, Argentina and So Jos de Itabora, Brazil.
format Articulo
Articulo
author Gelfo, Javier Nicolás
Sigé, Bernard
author_facet Gelfo, Javier Nicolás
Sigé, Bernard
author_sort Gelfo, Javier Nicolás
title A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru
title_short A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru
title_full A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru
title_fullStr A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru
title_full_unstemmed A new didolodontid mammal from the late Paleocene–earliest Eocene of Laguna Umayo, Peru
title_sort new didolodontid mammal from the late paleocene–earliest eocene of laguna umayo, peru
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84217
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