Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
           Superfamily Trochoidea Rafinesque, 1815
             Family Turbinidae Rafinesque, 1815 - turban snails
               Subfamily Tricoliinae Woodring, 1928 [monotypic]
                 Genus Tricolia Risso, 1826
                   1 Subgenus Aizyella Cossmann, 1889
                   2 Subgenus Eotricolia Kuroda & Habe, 1952
                   3 Subgenus Hiloa Pilsbry, 1917
                   4 Subgenus Orthomesus Pilsbry, 1888
                   5 Subgenus Phasianochilus Cossmann, 1889
                   6 Subgenus Steganomphalus Harris & Burrows, 1891
                   7 Subgenus Tricolia Risso, 1826
                   8 Subgenus Tricolietta Nordsieck, 1973