INSTITUTO SUPERIOR DE CORRELACION GEOLOGICA
Unidad Ejecutora - UE
A new Eocene dasypodid with caniniforms (Mammalia, Xenarthra, Cingulata) from Northwest Argentina
HERRERA CLAUDIA; CECILIA DEL PAPA; JAIME POWELL; GRACIELA ESTEBAN
JOURNAL OF MAMMALIAN EVOLUTION
Lugar: Berlin; Año: 2016
The aim of this work is to present a new genus and species of Dasypodidae from the Lumbrera Formation(?lower Lumbrera?), early-middle Eocene of Salta Province, northwest Argentina. The new taxon,documented by one specimen, consists of an incomplete skull and jaw with teeth housed in their alveoli,postcranial remains, and isolated osteoderms. Lumbreratherium oblitum, gen. et sp. nov., is characterized byheterodont dentition, with a caniniform as the first tooth, diastema between caniniform and first molariform,teeth with closed roots, and a peculiar morphology of the osteoderms. A phylogenetic analysis indicates thatLumbreratherium oblitum, gen. et sp. nov., and Pucatherium parvum belong to a monophyletic clade in abasal position within the Cingulata. The singularity of the morphological characteristics of these Paleogenearmadillos of northwest Argentina reinforces the hypothesis of an intertropical origin of mammal cladesdifferent from those of the Paleogene in more austral regions of Argentina.