[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Order Rajiformes Berg, 1940 - skates
         Family Rajidae Blainville, 1816 - skates
           Genus Amblyraja Malm, 1877
             1 Amblyraja hyperborea (Collett, 1879) - arctic skate
             2 Amblyraja jenseni (Bigelow & Schroeder, 1950) - Jensen's skate
             3 Amblyraja radiata (Donovan, 1808) - thorny skate