Serpentes see Suborder Serpentes Linnaeus, 1758
   Alethinophidia Nopcsa, 1923 see Infraorder Alethinophidia Nopcsa, 1923
     Caenophidia Hoffstetter, 1939
       Colubroidea Oppel, 1811
         Family Colubridae Oppel, 1811 - colubrids
           Subfamily Dipsadinae Guenther, 1858 - American snail-eating snakes