[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 - hardnose skates
           1 Genus Amblyraja Malm, 1877
           2 Genus Bathyraja Ishiyama, 1958
           3 Genus Dipturus Rafinesque, 1810
           4 Genus Leucoraja Malm, 1877
           5 Genus Malacoraja Stehmann, 1970
           6 Genus Neoraja McEachran & Compagno, 1982
           7 Genus Raja Linnaeus, 1758 - skates
           8 Genus Rajella Stehmann, 1970
           9 Genus Rostroraja Hulley, 1972