Ancistrodon is a taxonomic synonym that may refer to any of the following genera:
Agkistrodon, a.k.a. copperheads and moccasins, a group of venomous pitvipers found in Central and North America Deinagkistrodon, a monotypic genus containing the species D. acutus, a.k.a. the hundred-pace viper, found in Southeast Asia Gloydius, a.k.a. Asian moccasins, found in Asia