Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Aulopiformes Rosen, 1973 - lizardfishes
           Family Alepisauridae - lancetfishes
           Family Anotopteridae - daggertooths
           Family Aulopidae Cope, 1872 - aulopus
           Family †Cheirothricidae see Family Cheirotricidae Woodward, 1901
           Family Chlorophthalmidae Jordan, 1923 - greeneyes
           Family †Cimolichthyidae Goody, 1969
           Family †Dercetidae Pictet, 1850
           Family †Enchodontidae Woodward, 1901
           Family †Eurypholidae Goody, 1969 see Family Enchodontidae Woodward, 1901
           Family Evermannellidae - sabertooth fishes
           Family Giganturidae - telescopefishes
           Family †Halecidae Agassiz, 1834
           Family †Ichthyotringidae Jordan, 1905
           Family Notosudidae - paperbones
           Family Omosudidae - omosudids
           Family Paralepididae - barracudinas
           Family Pseudotrichonotidae
           Family Scopelarchidae - pearleyes
           Family †Serrilepidae Chalifa, 1989
           Family Synodontidae Gill, 1861 - lizard fishes
           Family †Tomognathidae