Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944
       Order Mytilida Férussac, 1822 [monotypic]
         Suborder Mytilina Férussac, 1822 [monotypic] see Order Mytilida Férussac, 1822
           Superfamily Mytiloidea Rafinesque, 1815 [monotypic]
             Family Mytilidae Rafinesque, 1815 - marine mussels
               Subfamily Modiolinae Termier & Termier, 1950, nom. protect.
                 1 Genus Modiolus Lamarck, 1799
                 2 Genus Amygdalum Megerle von Mühlfeld, 1811
                 3 Genus Benthomodiolus Dell, 1987
                 4 Genus Botula Mörch, 1853
                 5 Genus Dacrydium Torell, 1859
                 6 Genus Geukensia van de Poel, 1959
                 7 Genus Idas Jeffreys, 1876
                 8 Genus Lioberus Dall, 1898
                 9 Genus Modiolula Sacco, 1898