Nuevo Ruscinomys (Rodentia, Mammalia) en el Mioceno superior de la region de Teruel (Espana)

Abstract

Presents a study of a new form of Ruscinomys. It is characterized by the extraordinary development of the protocone of the first upper molar, which gives it a much greater width than that of its homonyme Ruscinomys schaubi from the same site at Aljezar B. Clear discriminating morphological characteristics have not been found in the other dental pieces. Those molars which have a width clearly falling outside the normal distribution of Ruscinomys schaubi are attributed to the new species.