Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
       Order Cephalaspidea Fischer, 1883
         Superfamily Runcinoidea Adams & Adams, 1854
           Family Runcinidae Adams & Adams, 1854
             Subfamily Runcininae Adams & Adams, 1854 see Family Runcinidae Adams & Adams, 1854
               1 Genus Runcina Forbes, 1851
               2 Genus Runcinida Burn, 1963
               3 Genus Runcinella Odhner, 1924
               4 Genus Runnica Miller & Rudman, 1968 see Genus Runcina Forbes, 1851
               5 Genus Metaruncina Baba, 1967