Pilsbryoconcha expressaPilsbryoconcha expressa is a species in the genus Pilsbryoconcha, family Unionidae, order Unionida.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderUnionidaFamilyUnionidaeGenusPilsbryoconchaSpeciesPilsbryoconcha expressa