Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
         Superorder Euselachii Hay, 1902 see Infraclass Euselachii Hay, 1902
           Order Squalomorpha see Superorder Squalomorphii (Compagno, 1973)
             Suborder Squaloidea see Order Squaliformes Compagno, 1973
               1 Family Squalidae Blainville, 1816 - dogfish sharks
               2 Family Dalatiidae Gray, 1851 - kitefin sharks
               3 Family Echinorhinidae Gill, 1862 - bramble sharks