Alethinophidia

Alethinophidia merupakan infraorder ular yang merangkumi kesemua ular selain ular buta dan ular benang. Kini, 15 famili telah dikenal pasti, termasuk 9 subfamili dan 316 genus.^[1]

Famili: Acrochordidae Bonaparte, 1831 -- ular berkutil
Famili: Aniliidae Stejneger, 1907 -- ular karang palsu
Famili: Anomochilidae Cundall, Wallach and Rossman, 1993 -- ular paip kerdil
Famili: Atractaspididae Günther, 1858 -- ular asp mengorek Afrika, ular tumit tinggi
Famili: Boidae Gray, 1825 -- boa
- Subfamili: Boinae Gray, 1825 -- boa
- Subfamili: Erycinae Bonaparte, 1831 -- boa pasir Dunia Lama
Famili: Bolyeriidae Hoffstetter, 1946 -- ular Mauritius
Famili: Colubridae Oppel, 1811 -- colubrid, ular biasa
- Subfamili: Homalopsinae Günther, 1864
- Subfamili: Natricinae Bonaparte, 1838
- Subfamili: Xenodontinae Cope, 1895
Famili: Cylindrophiidae Fitzinger, 1843 -- Asian pipe snakes
Famili: Elapidae F. Boie, 1827 -- kobra, ular karang, mamba, ular laut
Famili: Loxocemidae Cope, 1861 -- ular sawa Mexico
Famili: Pythonidae Fitzinger, 1826 -- ular sawa
Famili: Tropidophiidae Brongersma, 1951 -- boa kerdil
Famili: Uropeltidae Müller, 1832 -- ular paip, ular berekor perisai
Famili: Viperidae Oppel, 1811 -- ular kapak
- Subfamili: Azemiopinae Liem, Marx and Rabb, 1971 -- ular kapak Fae
- Subfamili: Causinae Cope, 1859 -- adder malam
- Subfamili: Crotalinae Oppel, 1811 -- ular orok-orok
- Subfamili: Viperinae Oppel, 1811 -- ular kapak tanpa lubang
Famili: Xenopeltidae Bonaparte, 1845 -- ular sinar matahari
Famili: †Nigerophiidae