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 Muricidae Rafinesque, 1815 - drills
               Subfamily Muricopsinae Radwin & d'Attilio, 1971
                 1 Genus Muricopsis Bucquoy & Dautzenberg, 1882
                 2 Genus Murexsul Iredale, 1915
                 3 Genus Acanthotrophon Hertlein & Strong, 1951
                 4 Genus Favartia Jousseaume, 1880
                 5 Genus Lataxiena Jousseaume, 1883
                 6 Genus Maxwellia Baily, 1950
                 7 Genus Murexiella Clench & Farfante, 1945
                 8 Genus Subpterynotus Olsson & Harbison, 1953
                 9 Genus Pradoxa Fernandes & Rolán, 1993