Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Caenogastropoda Cox, 1960 see Superorder Caenogastropoda Cox, 1960
         Suborder Neotaenioglossa Haller, 1882 see Order Sorbeoconcha Ponder & Lindberg, 1997
           Superfamily Trivioidea F.H. Troschel, 1863 see Superfamily Velutinoidea Gray, 1840
             Family Triviidae Troschel, 1863 - trivias
               Subfamily Triviinae Troschel, 1863
                 Tribe Triviellini Schilder, 1939 see Subfamily Triviinae Troschel, 1863
                   1 Genus Fossatrivia Iredale, 1931
                   2 Genus Galeatrivia Cate, 1979
                   3 Genus †Nototrivia Schilder, 1932
                   4 Genus Semitrivia Cossmann, 1903
                   5 Genus Triviella Jousseaume, 1884
                   6 Genus †Willungia Powell, 1938