''Sagittunio subrostratus'', commonly referred to as the pondmussel or black pondmussel, is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

freshwater mussel Freshwater bivalves are molluscs of the order Bivalvia that inhabit freshwater ecosystems. They are one of the two main groups of freshwater molluscs, along with freshwater snails. The majority of bivalve molluscs are saltwater species that l ...

, an aquatic

bivalve Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed b ...

in the family

Unionidae The Unionidae are a Family (biology), family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. The range of distribution for this family is world-wide. It is a ...

, the river mussels.

References

External links

Lea I. (1834). Observations on the naïades; and descriptions of new species of that, and other families. Transactions of the American Philosophical Society. (NS) 5: 23–119, pls 1–19

Conrad, T. A. (1849). Descriptions of new fresh water and marine shells. Journal of the Academy of Natural Sciences of Philadelphia. (2) 1(4): 275–280, plates 37–39

Lea, I. (1859). Descriptions of seven new species of uniones from South Carolina, Florida, Alabama and Texas. Proceedings of the Academy of Natural Sciences of Philadelphia. 11: 154–155

Lea, I. (1868). Description of sixteen new species of the genus Unio of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia. 20: 143-145

Simpson, C. T. (1914). A descriptive catalogue of the naiades, or pearly fresh-water mussels. Part I Unionidae, Truncilla - Margaritana. Bryant Walker, Detroit, Michigan. Pp. 1–524
subrostratus Endemic molluscs of the United States Freshwater bivalves Taxa named by Thomas Say Bivalves described in 1831 {{Unionidae-stub