. . . . . "Epioblasma walkeri, common name the tan riffleshell, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.Many scientists now recognize this mussel as synonymous or a subspecies of the presumed extinct Epioblasma florentina due to integrating shell characteristics between them."@en . . "G1" . . "Epioblasma florentina walkeri" . "TNC" . "Epioblasma walkeri"@en . .