''Alasmidonta robusta'', the Carolina elktoe, was a species of freshwater

mussel Mussel () is the common name used for members of several families of bivalve molluscs, from saltwater and Freshwater bivalve, freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other ...

, an aquatic

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

mollusk in the family Unionidae, the river mussels.

Distribution

This species was endemic to North Carolina, and was known only from its type specimen collected in

Montgomery County, North Carolina Montgomery County is a rural county located in the southern Piedmont of the U.S. state of North Carolina. As of the 2020 census, the population was 25,751. Its county seat is Troy. History The county was formed in January 1779, by an act ...

. No specimens have been found since, and are presumed extinct.

References

robusta Molluscs described in 1981 Taxonomy articles created by Polbot {{Unionidae-stub