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 Dorsaninae Cossmann, 1901
                 1 ?Genus †Ambullina Palmer, 1937
                 2 Genus Dorsanum Gray, 1847
                 3 Genus †Colwellia Nuttall & Cooper, 1973
                 4 Genus †Cyllenina Bellardi, 1883
                 5 Genus †Keepingia Nuttall & Cooper, 1973
                 6 Genus "Molopophorus" Gabb, 1869
                 7 Genus †Pseudocominella Nuttall & Cooper, 1973
                 8 Genus †Whitecliffia Nuttall & Cooper, 1973