Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Subphylum Conchifera Gegenbauer, 1878
             1 Order Cephalaspidea Fischer, 1883
             1 Family Dentaliidae Children, 1834
             1 Order Diotocardia
             1 Subclass Tetrabranchiata see Subclass Nautiloidea Agassiz, 1848
             1 Family Tryblidiidae Pilsbry, in Zittel-Eastman, 1899
             2 Order Basommatophora Keferstein, 1865 see Suborder Basommatophora Keferstein, in Bronn, 1864
             2 Family †Cyrtonellidae Knight & Yochelson, 1958
             2 Subclass Dibranchiata Owen, 1836 see Subclass Coleoidea Bather, 1888
             2 Class Gastropoda Cuvier, 1795 - snails and slugs
             2 Order Monotocardia
             2 Family Siphonodentaliidae Tryon, 1884 see Subfamily Siphonodentaliinae Tryon, 1884
             3 Class Scaphopoda Bronn, 1862 - tusk shells
             3 Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
             4 Class Bivalvia Linnaeus, 1758 - bivalves
             4 Order Soleolifera Colosi, 1921 see Superfamily Veronicellacea J.E. Gray, 1840
             5 Order Anaspidea Fischer, 1883 - sea hares
             6 Order Saccoglossa von Ihering, 1876
             7 Order Notaspidea Fischer, 1883 see Suborder Notaspidea Fischer, 1883
             8 Order Nudibranchia Cuvier, 1814 - "true" nudibranchs
             n Family Gastrochaenidae Gray, 1840 - rock borers