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 of la pampa and choele choel (northern rio negro province).