Reconsideración sobre la posición sistemática de Loncornis erectus Ameghino, 1899 (Mammalia; non Aves)

Abstract

In this note the holotype of the genus and species Loncornis erectus, coming from the Oligocene Deseado Formation of the Deseado River, Santa Cruz province, Argentina is revised. The holotypical specimen has been considered as a distal extreme of a right femur and is here reinterpreted as the proximal portion of a left mammalian humerus. The absence of diagnostic features in the holotype of Loncornis erectus allows us to consider this taxon as a nomen dubium.