Unio (Elliptio) viridis Rafinesque, 1820 Alasmidonta viridis, the slippershell mussel, is a species of mussel in the family Unionidae, the river mussels.

[1][2][3] It is found in the central and eastern United States and in Ontario, Canada.

[1][2] It is threatened in parts of its range, but it is not threatened as a species.

[1][2] Alasmidonta viridis primarily occurs in creeks and headwaters of rivers, but has also been found in larger rivers and in lakes.

This Unionidae-related article is a stub.