The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina

This study describes new remains of Hegetotheriidae (Notoungulata), including a new species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province, Argentina. The assemblage is composed of four hegetotheriines, Prohegetotherium cf. P. sculptum, Prohegetotherium sp., Prohegetotherium...

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Autores principales: Cerdeño Serrano, María Esperanza, Reguero, Marcelo Alfredo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/100640
https://ri.conicet.gov.ar/11336/48566
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-100640
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
spellingShingle Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
Cerdeño Serrano, María Esperanza
Reguero, Marcelo Alfredo
The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
topic_facet Ciencias Naturales
Systematics
Hegetotheriids
Quebrada Fiera
Mendoza
Deseadan age
description This study describes new remains of Hegetotheriidae (Notoungulata), including a new species, from the Deseadan (late Oligocene) of Quebrada Fiera, Mendoza Province, Argentina. The assemblage is composed of four hegetotheriines, Prohegetotherium cf. P. sculptum, Prohegetotherium sp., Prohegetotherium schiaffinoi, Prohegetotherium malalhuense sp. nov., and the pachyrukhine Propachyrucos cf. P. simpsoni. The presence of Prosotherium cannot be totally discarded as lower molariforms are rather similar between both pachyrukhine genera. The new species Prohegetotherium malalhuense sp. nov. differs from all previously described hegetotheriines by lingually projecting, sharp parastyle and marked parastyle groove on ectoloph of M2-3; talonid of m1-m2 posterolabially projected; talonid of m3 with marked posterolabial groove; and smaller size. Its phylogenetic affinities are not well resolved; Prohegetotherium results paraphyletic, with P. sculptum as sister taxon of the remaining hegetotheres, and the new taxon more related to Hegetotherium mirabile than to P. schiaffinoi. The recognition of P. schiaffinoi and Prohegetotherium cf. P. sculptum emphasizes that the fauna from Quebrada Fiera shares elements with roughly contemporaneous Deseadan faunas from northern and southern latitudes, but important faunal particularities distinguish the region as well. The record of pachyrukhines at Quebrada Fiera more closely resembles Deseadan faunas in Patagonia than temporally correlative faunas from Bolivia and Uruguay, and indicates the presence of suitable habitats in mid-latitudes of Argentina for this hypselodont clade. Faunal affinities together with particular taxa from Quebrada Fiera seem to support a significant faunal provinciality in South America during the late Oligocene.
format Articulo
Articulo
author Cerdeño Serrano, María Esperanza
Reguero, Marcelo Alfredo
author_facet Cerdeño Serrano, María Esperanza
Reguero, Marcelo Alfredo
author_sort Cerdeño Serrano, María Esperanza
title The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_short The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_full The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_fullStr The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_full_unstemmed The Hegetotheriidae (Mammalia, Notoungulata) assemblage from the late Oligocene of Mendoza, central-western Argentina
title_sort hegetotheriidae (mammalia, notoungulata) assemblage from the late oligocene of mendoza, central-western argentina
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/100640
https://ri.conicet.gov.ar/11336/48566
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