[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 Gobiesociformes Gill, 1872
         Family Gobiesocidae Günther, 1861 - clingfishes and singleslits
           Genus Opeatogenys Briggs, 1955
             1 Opeatogenys gracilis (Canestrini, 1864)