Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944
       Order Ostreida Férussac, 1822
         Suborder Pectinina Gray, 1854 see Order Pectinida Gray, 1854
           Superfamily Pectinoidea Rafinesque, 1815
             1 Family Pectinidae Rafinesque, 1815 - scallops
             2 Family Syncyclonemidae Waller, 1978, orth. inval. [monotypic] see Family Syncyclonematidae Waller, 1978
             3 Family Propeamussiidae Abbott, 1954
             4 Family Spondylidae Gray, 1826 [monotypic] - thorny oysters