[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 Saccopharyngiformes - sackpharynx fishes see Suborder Saccopharyngoidei
         Family Monognathidae - monognathids
           Genus Monognathus Bertin, 1936
             1 Monognathus bertini Bertelsen & Nielsen, 1987
             2 Monognathus boehlkei Bertelsen & Nielsen, 1987
             3 Monognathus herringi Bertelsen & Nielsen, 1987
             4 Monognathus jesperseni Bertin, 1936
             5 Monognathus nigeli Bertelsen & Nielsen, 1987