Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
         (Helicid Sigmurethra)
           Superfamily Helixarionoidea Bourguignat, 1883, orth. inval.
             Family Urocyclidae Simroth, 1889
               Subfamily Trochozonitinae Iredale, 1914 see Subfamily Sheldoniinae Connolly, 1925 (1912)
                 1 Genus Trochozonites Pfeffer, 1883
                 2 Genus Africarion Godwin-Austen, 1883
                 3 Genus Gynnarion Millard, 1996, orth. inval. see Genus Gymnarion Pilsbry, 1919
                 4 Genus Lacrimarion Connolly, 1939
                 5 Genus Mesafricarion Pilsbry, 1919
                 6 Genus Sheldonia Ancey, 1887
                 7 Genus Thapsia Albers, 1860
                 8 Genus Trochonanina Mousson, 1869
                 9 Genus Zonitarion Pfeffer, 1883