Last year, in the journal quoted below, he attempted to prove the descent of the modern elephant, through Pyrotherium and certain other forms, from a primitive opossum (Proteodidelphys).

Meet the tiny Patagonian monito that is a ‘living fossil’ from the ancient past ... such as opossums, that live in the Americas – something that’s long puzzled scientists.

Estrus in Patagonian maras is so short that a male trying to mate with several females would struggle to strike while they were hot. Monogamy, on the other hand, helps ensure successful mating by ...

The exotic Patagonian mara — a tiny two to three-foot-tall critter — has been seen by park rangers, hikers, and visitors in Bear Creek Lake Park in Lakewood, Colo., just about 15 miles outside ...

LAKEWOOD, Colo. — A Patagonian mara seen multiple times at a Lakewood park in July is presumed dead, a naturalist at Bear Creek Lake Park said in an update on the park's Facebook page. According ...

Colorado wildlife officers are on the lookout for a Patagonian mara roaming a Lakewood park, though it’s unclear how the large rodent native to South America made its way to metro Denver.