Subclass Pulmonata Cuvier, 1814 - land snails and slugs see Order Pulmonata Cuvier, 1814
   Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
     01 Family Succineidae Beck, 1837
     02 Family Cochlicopidae Pilsbry, 1900 (1879)
     03 Family Pyramidulidae Kennard & Woodward, 1914
     04 Family Vertiginidae Fitzinger, 1833
     05 Family Orculidae Pilsbry, 1918
     06 Family Chondrinidae Steenberg, 1925
     07 Family Pupillidae Turton, 1831
     08 Family Valloniidae Morse, 1864
     09 Family Pleurodiscidae Wenz, 1923
     10 Family Enidae Woodward, 1903 (1880)
     11 Family Endodontidae Pilsbry, 1895
     12 Family Arionidae Gray, 1840
     13 Family Vitrinidae Fitzinger, 1833
     14 Family Zonitidae Mörch, 1864
     15 Family Milacidae Ellis, 1926