Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct. see Subphylum Vertebrata Cuvier, 1812
       Vertebrata (Lamarck, 1801) - vertebrates see Subphylum Vertebrata Cuvier, 1812
         Myopterygii - myopterygians
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Grade Teleostomi Bonaparte, 1836
               Euteleostomi - bony vertebrates
                 Class Actinopterygii Woodward, 1891 - ray-finned fishes
                   Subclass Neopterygii Regan, 1923
                     Division Teleostei Müller, 1845 see Infraclass Teleostei Müller, 1845
                       Elopocephala see Supercohort Teleocephala de Pinna, 1996
                         Clupeocephala
                           Subdivision Euteleostei Greenwood et al., 1966 [monophyletic?] see Cohort Euteleosteomorpha (Greenwood et al., 1966)
                             Superorder Protacanthopterygii Greenwood et al., 1966 see Subcohort Protacanthopterygii Greenwood et al., 1966
                               Order Argentiniformes Johnson & Patterson, 1996 - marine smelts
                                 Suborder Argentinoidei Bertelsen, 1958
                                   Family Opisthoproctidae - spookfishes
                                     1 Genus Bathylychnops Cohen, 1958
                                     2 Genus Dolichopteryx Brauer, 1902
                                     3 Genus Macropinna Chapman, 1939
                                     4 Genus Opisthoproctus Vaillant, 1888
                                     5 Genus Rhynchohyalus Barnard, 1925
                                     6 Genus Winteria Brauer, 1901