<==o PROTEROGLYPHA
   |--o Atractaspididae [+Aparallactinae]
   |  |-- Atractaspis
   |  |-- Aparallactus
   |  |-- Brachyophis
   |  |-- Elapotinus
   |  |-- Hypoptophis
   |  |-- Macrelaps
   |  |-- Amblyodipsas
   |  |-- Xenocalamus
   |  |-- Chilorhinophis
   |  |-- Polemon
   |  `-- Micrelaps
   |?- Colubridae (tarhakäärmeet) [possibly paraphyletic]
   `-- Elapidae (myrkkytarhakäärmeet)