GryphaeidaeGryphaeidae is a family in the order Ostreida, containing 84 described species.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumMolluscaClassBivalviaOrderOstreidaFamilyGryphaeidaeGeneraExogyra17Pycnodonte17Texigryphaea9Hyotissa7Gryphaea6Gryphaeostrea6Ceratostreon4Crenostrea3Liostrea3Rhynchostreon3Ilymatogyra2Neopycnodonte2Amphidonte1Argutostrea1Empressostrea1Nanogyra1Pycnogryphaea1