Another animal that is at least in one respect allied to the 'possum is the coypu.
In habits and otherwise the coypu is much like the beaver, but is a smaller animal, and has a rounder tail.
The coypu, sometimes called the South American beaver, inhabits the river-banks, and is highly prized for its fur.
One was the common Magellan otter (Lutra felina), the other a nutria (Myopotamus coypu).
coypu are abundant in the fresh waters of South America, even small ponds being often tenanted by one or more pairs.