Los roedores “Mesopotamienses” (Mioceno tardío, Formación Ituzaingó, provincia de Entre Ríos).

CANDELA, ADRIANA MAGDALENA

Temas de la Biodiversidad del Litoral Fluvial Argentino, II serie INSUGEO, Miscelánea 14

Instituto Superior de Correlación Geológica. Insugeo

Lugar: San Miguel de Tucumán; Año: 2005 vol. II p. 37 - 48

1514-4275

The Hystricognathi rodents recorded in the “Conglomerado osífero” (= “Mesopotamiense”, Late Miocene, Huayquerian Age), outcropping in the base of the Ituzaingó Formation (Entre Ríos, Argentina), show a wide species diversity, encompassing all South American superfamilies of the Suborder. Among them, the unusual assemblage of echimyids, abrocomids, neoepiblemids and Myocastor is identified, a unique composition not registered before in any other South American Cenozoic fossil fauna. In spite of the rich representativity of these “Mesopotamian” Hystricognathi, their systematics, biogeographic history, paleoenvironmental and biochronological significance remain poorly known. This contribution summarizes the state of knowledge of the Hystricognathi families from the Ituzaingó Formation (Entre Rios Province) and provides a preliminary list of species of the Suborder Hystricognathi coming from this unit, as a reference framework for future studies.