CAENOPHIDIA
Xenodermidea, Pareidae
Odd scaled snakes
Asian slag or snail eating snakes, south indian narrow headed snakes
Viperidae, Homalopsidae
Vipers
Mudsnakes
Elapoidea (Psuedasipidae, Lamprophiidae, Elapidae)
Mock vipers, mole snakes, keeled snakes
Diverse group of non venomous mediums sized snakes
over 300 venomous snakes and Emydocephalus (only harmless genus in it)
Colubridae
Colubrids. They make up around 80% of snakes.