Children (6 direct children, 8 direct and indirect children):
Ovophis tonkinensis
Tonkin pit viper
Ovophis okinavensis
Ovophis zayuensis
Zayuan mountain pit viper
Ovophis monticola
(tree size 2)
Chinese mountain pit viper
Ovophis convictus
Malayan brown pit viper
Ovophis makazayazaya
Taiwan mountain pitviper