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