Ophidia Brongniart, 1800
   Serpentes see Suborder Serpentes Linnaeus, 1758
     Alethinophidia Nopcsa, 1923 see Infraorder Alethinophidia Nopcsa, 1923
       Caenophidia Hoffstetter, 1939
         Elapoidea Boie, 1827 see Superfamily Colubroidea Oppel, 1811
           1 Family Elapidae Boie, 1827
           2 Family Atractaspididae Günther, 1858 - stiletto snakes see Subfamily Atractaspidinae
           3 Family Lamprophiidae Fitzinger, 1843
           4 Family Prosymnidae Kelly et al., 2009 see Subfamily Prosymninae
           5 Family Psammophiidae Bonaparte, 1845 see Subfamily Psammophiinae
           6 Family Pseudaspididae Cope, 1893 see Subfamily Pseudaspidinae
           7 Family Pseudoxyrhophiidae Dowling, 1975 see Subfamily Pseudoxyrhophiinae