Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Anomalodesmata Dall, 1889 [monotypic] see Order Anomalodesmata Dall, 1889
       Order Pholadomyida Newell, 1965
         Suborder Poromyina [monotypic] see Superfamily Poromyoidea Dall, 1886
           Superfamily Poromyoidea Dall, 1886 [monotypic]
             Family Poromyidae Dall, 1886
               Genus Poromya Forbes, 1844
                 1 Subgenus Cetoconcha Dall, 1886 see Genus Cetoconcha Dall, 1886
                 2 Subgenus Cetomya Dall, 1889
                 3 Subgenus Dermatomya Dall, 1889