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
             Family Pectinidae Rafinesque, 1815 - scallops
               Subfamily Pectininae Rafinesque, 1815
                 Tribe Decatopectenini Millard, 1997, orth. inval. see Tribe Decatopectinini Waller, 1986
                   Genus Semipallium Jousseaume, 1928
                     Subgenus Mesopeplum Iredale, 1929