Pyrgulopsis agarhecta F. G. Thompson, 1969 Marstonia agarhecta, common name Ocmulgee marstonia, is a species of freshwater snail with a gill and an operculum, aquatic gastropod mollusk in the family Hydrobiidae.

This species is endemic to Georgia, the United States.

[1] Its natural habitat is rivers.

It is threatened by habitat loss.

This Hydrobiidae-related article is a stub.