Pleurobema rubrum

Pleurobema rubrum, the pyramid pigtoe, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.

Pleurobema rubrum
Conservation status
Near Threatened  (IUCN 2.3)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionida
Family:	Unionidae
Genus:	Pleurobema
Species:	P. rubrum
Binomial name
Pleurobema rubrum Rafinesque, 1820

This species is endemic to the United States. Its habitat is in medium to large rivers in sand or gravel. Specimens are generally 4 inches (10 cm) long with a chestnut, thick shell.^[2]