Ophidia Brongniart, 1800
   Serpentes see Suborder Serpentes Linnaeus, 1758
     Alethinophidia Nopcsa, 1923 see Infraorder Alethinophidia Nopcsa, 1923
       Henophidia Hoffstetter, 1939 see Parvorder Henophidia Hoffstetter, 1939
         Pythonoidea Fitzinger, 1826
           1 Family Xenopeltidae Bonaparte, 1845 [monotypic] - sunbeam snakes
           2 Family Loxocemidae Cope, 1861 [monotypic]
           3 Family Pythonidae Fitzinger, 1826