Gryphaea planoconvexaGryphaea planoconvexa is a species in the genus Gryphaea, family Gryphaeidae, order Ostreida.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderOstreidaFamilyGryphaeidaeGenusGryphaeaSpeciesGryphaea planoconvexa