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 Batoidea see Superorder Batoidea
             Suborder Rajoidea see Order Rajiformes Berg, 1940
               1 Family Rajidae Blainville, 1816 - skates
               2 Family †Sclerorhynchidae Capetta, 1974
               3 Family Pseudorajidae Bigelow & Schroeder, 1954 see Family Rajidae Blainville, 1816
               4 Family Anacanthobatidae von Bonde & Swart, 1923 - smooth skates