Children (14 direct children, 190 direct and indirect children):
Montivipera
(tree size 9)
Cerastes
(tree size 6)
Cerastes (genus)
Causus
(tree size 7)
Bitis
(tree size 22)
African adders
Vipera
(tree size 69)
Atheris
(tree size 20)
Bush vipers
Echis
(tree size 20)
Saw-scaled vipers
Macrovipera
(tree size 8)
Pseudocerastes
(tree size 4)
Daboia
(tree size 7)
Eristicophis
(tree size 1)
Proatheris
(tree size 1)
Lowland swamp viper
Montatheris
(tree size 1)
Adenorhinos
(tree size 1)