Ancestor

Pachyophiidae

Dinilysia

Madtsoiidae

Leptotyphlopidae

Anomalepididae

Typhlopidae

Anilius

Cylindrophis

Uropeltidae

Anomochilus

Loxocemus

Xenopeltis

Erycinae

Boinae

Pythoninae

Ungaliophiinae

Tropidophiinae

Bolyeriidae

Colubroidea

Acrochordidae