Patagonian opossum Patagonian opossum The Patagonian opossum "(Lestodelphys halli)" is the sole species in genus Lestodelphys. The Patagonian opossum occurs further south, in Argentina, than any other living marsupial. Although distributed throughout some parts of southern Argentina, it is one of the least known mammals of South America. They have been spotted near Monte Phytogeographic Province, and in Patagonia Phytogeographic Province, yet there are no records of Patagonian opossums in central Patagonia, which leads mammalogists to believe that they can only live in the Patagonian steppe. There are two areas in the Patagonian steppe where these animals are often found: the province
North Patagonian Massif contains the Miocene (Colloncuran) Collón Cura Formation, the Miocene La Pava Formation, and the Miocene Chimehuín Formation in the northern part of the eastern belt. North Patagonian Massif The North Patagonian Massif or Somún Cura Massif (Spanish: "Macizo Norpatagónico", "Macizo Nordpatagónico" or "Macizo de Somún Cura") is a massif in northern Patagonia located in the Argentine provinces of Río Negro and Chubut. The massif is a plateau surrounded by sedimentary basins. The North Patagonian Massif covers an area of approximately . The massif rises above the surrounding topography reaching a maximum of above sea level. Compared to neighboring areas, the