Epioblasma stewardsoniiEpioblasma stewardsonii is a species in the genus Epioblasma, family Unionidae, order Unionida.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderUnionidaFamilyUnionidaeGenusEpioblasmaSpeciesEpioblasma stewardsonii