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
       Order Squaliformes Compagno, 1973 - dogfish sharks
         1 Family Echinorhinidae Gill, 1862 - bramble sharks
         2 Family Oxynotidae Gill, 1872 - rough sharks
         3 Family Squalidae Blainville, 1816 - dogfish sharks