Plethobasus cyphyus
Animal
Plethobasus cyphyus, the sheepnose mussel, 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. Wikipedia
Conservation status: Endangered (Population decreasing)
Scientific name: Plethobasus cyphyus