Plethobasus cyphyus

The sheepnose mussel (Plethobasus cyphyus) is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is endemic to the Midwest and Southeast United States. It is currently listed as vulnerable as it is no longer in two-thirds of its historical range.

Plethobasus cyphyus

The sheepnose mussel (Plethobasus cyphyus) is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is endemic to the Midwest and Southeast United States. It is currently listed as vulnerable as it is no longer in two-thirds of its historical range.