[Mollusca] Linnaeus, 1758 - molluscs
   Bivalvia Linnaeus, 1758 - bivalves
     Mytiloida Férussac, 1822 see Order Mytilida Férussac, 1822
       Pteriacea Gray, 1847 see Superfamily Pterioidea Gray, 1847 (1820)
         Isognomonidae Woodring, 1925 (1828)
           Isognomon Solander, 1786
             1 Isognomon (Isognomon) Solander, 1786 see Genus Isognomon Solander, 1786
             2 Isognomon (Isogonum) Röding, 1798 see Genus Isogonum Röding, 1798