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 Buccinidae Rafinesque, 1815 - whelks
               Subfamily Photinae Gray, 1857 see Subfamily Pisaniinae Gray, 1857
                 Genus Phos Montfort, 1810
                   1 Subgenus †Cymatophos Pilsbry & Olsson, 1941
                   2 Subgenus Engoniophos Woodring, 1928
                   3 Subgenus Metaphos Olsson, 1964
                   4 Subgenus †Philindophos Shuto, 1969
                   5 Subgenus †Strombinophos Pilsbry & Olsson, 1941
                   6 Subgenus Strongylocera Mörch, 1852