[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
       Order Pleuronectiformes Bleeker, 1859 - flatfishes
         Family Cynoglossidae Jordan, 1963 - tonguefishes
           Genus Cynoglossus Hamilton-Buchanan, 1822
             1 Cynoglossus browni Chabanaud, 1949 - Nigerian tonguesole
             2 Cynoglossus sinusarabici (Chabanaud, 1931)