Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Neogastropoda Wenz, 1938 see Suborder Neogastropoda Wenz, 1938
         Suborder Stenoglossa Bouvier, 1887
           Superfamily Muricoidea Rafinesque, 1815
             Family Nassariidae Iredale, 1916 (1835) - mud snails
               Subfamily Nassariinae Iredale, 1916 (1835)
                 Genus Nassarius Duméril, 1806
                   01 Subgenus Alectrion Montfort, 1810
                   02 Subgenus Allanassa Iredale, 1929
                   03 Subgenus Caesia Adams & Adams, 1853
                   04 Subgenus Catillon Cernohorsky, 1984, orth. inval. see Subgenus Catilon Addicott, 1965
                   05 Subgenus Cryptonassarius Cernohorsky, 1975
                   06 Subgenus Nassodonta Adams, 1867
                   07 Subgenus Naytia Adams & Adams, 1853
                   08 Subgenus Pallacera Woodring, 1964
                   09 Subgenus Phrontis Adams & Adams, 1853
                   10 Subgenus Profundinassa Thiele, 1929
                   11 Subgenus Pygmaeonassa Annandale, 1924
                   12 Subgenus Varicinassa Habe, 1946
                   13 Subgenus Zeuxis Adams & Adams, 1853