[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 Symphurus Rafinesque, 1810 - tonguefish
             1 Symphurus insularis Munroe, Brito & Hernández, 2000
             2 Symphurus ligulatus (Cocco, 1844) - elongate tonguesole
             3 Symphurus nigrescens Rafinesque, 1810 - tonguesole
             4 Symphurus reticulatus Munroe, 1990