Epioblasma triquetraEpioblasma triquetra is a species in the genus Epioblasma, family Unionidae, order Unionida.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderUnionidaFamilyUnionidaeGenusEpioblasmaSpeciesEpioblasma triquetra