Potamilus amphichaenusPotamilus amphichaenus is a species in the genus Potamilus, family Unionidae, order Unionida.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderUnionidaFamilyUnionidaeGenusPotamilusSpeciesPotamilus amphichaenus