[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 Rhinobatidae Bonaparte, 1835 - guitarfishes
           Genus Rhinobatos Linck, 1790
             1 Rhinobatos cemiculus Geoffroy Saint-Hilaire, 1817 - blackchin guitarfish
             2 Rhinobatos rhinobatos (C. Linnaeus, 1758) - common guitarfish