Keenocardium californienseKeenocardium californiense is a species in the genus Keenocardium, family Cardiidae, order Cardiida.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderCardiidaFamilyCardiidaeGenusKeenocardiumSpeciesKeenocardium californiense