- Viperidae, family Viperidae - Old World vipers
--1 is a kind of reptile family
--1 is a member of Serpentes, suborder Serpentes, Ophidia, suborder Ophidia
--1 has members:viper; Vipera, genus Vipera; Bitis, genus Bitis; genus Cerastes, Aspis, genus Aspis