New Cingulata (Mammalia, Xenarthra) from the Upper Lumbrera Formation (Bartonian, middle Eocene), Salta Province, Argentina
DOI:
https://doi.org/10.4072/rbp.2021.3.05Abstract
We describe isolated remains of a Paleogene cingulate from El Simbolar locality, Upper Lumbrera Formation (Bartonian),
southern Salta Province, northwestern Argentina. The material consists of numerous fixed, movable, and caudal sheath osteoderms. The specimen has large-sized osteoderms, with a lageniform main figure, as in Utaetus buccatus, U. laxus, U. argos, ?U. deustus, Punatherium catamarcensis, and the basal euphractin Archaeutatus. The combination of morphological characters, in addition to its large size, allows us to recognize a new species of “Utaetini” for the Paleogene of northwestern Argentina. This new species of ?Utaetus represents the oldest record of Euphractinae in this region, and strengthens the endemic condition of its Paleogene faunas.
Keywords: Cingulata, osteoderms, El Simbolar, Paleogene, Salta, Argentina.
RESUMO – Nós descrevemos restos isolados de cingulado do Paleógeno da localidade de El Simbolar, Formação Lumbrera Superior (Bartoniano), sul da Província de Salta, noroeste da Argentina. O material consiste em numerosos osteodermos das bandas fixas, móveis e caudais. Os osteodermos têm tamanho grande, com uma figura principal de aspecto lageniforme, como em Utaetus buccatus, U. laxus, U. argos, ?U. deustus, Punatherium catamarcensis, e o eufractino basal Archaeutatus. A combinação de caracteres morfológicos, em adição ao seu grande tamanho, nos permite reconhecer uma nova espécie de “Utaetini” para o Paleógeno do noroeste da Argentina. Esta nova espécie de ?Utaetus representa o registro mais antigo para Euphractinae nesta região e fortalece a condição endêmica das faunas paleógenas no noroeste da Argentina.
Palavras-chave: Cingulata, osteodermos, El Simbolar, Paleógeno, Salta, Argentina.
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