Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
   Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
     Cohort Euselachii Hay, 1902 - spined sharks and relatives see Infraclass Euselachii Hay, 1902
       Subcohort Neoselachii Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977
         Superorder Squalomorphii (Compagno, 1973) see Division Squalea (Shirai, 1996)
           Order Squaliformes Compagno, 1973 - dogfish sharks
             1 Family Echinorhinidae Gill, 1862 - bramble sharks
             2 Family Squalidae Blainville, 1816 - dogfish sharks
             3 Family Centrophoridae Bleeker, 1859 - gulper sharks
             4 Family Etmopteridae Fowler, 1934 - lantern sharks
             5 Family Somniosidae Jordan, 1888 - sleeper sharks
             6 Family Oxynotidae Gill, 1872 - rough sharks
             7 Family Dalatiidae Gray, 1851 - kitefin sharks