- Crotalidae, family Crotalidae - New World vipers: pit vipers
--1 is a kind of reptile family
--1 is a member of Serpentes, suborder Serpentes, Ophidia, suborder Ophidia
--1 has members:pit viper; Agkistrodon, genus Agkistrodon, Ancistrodon, genus Ancistrodon; rattlesnake, rattler; Crotalus, genus Crotalus; Sistrurus, genus Sistrurus; Bothrops, genus Bothrops