Mastigoproctus is a genus of whip scorpions. Native to the tropical forest regions of northern South America, these whip scorpions can reach a length of up to 9 centimetres (3.5 in) and can weigh over 30 grams (1.1 oz). Despite popular belief, they are not venomous as, like all other whip scorpions, they do not possess venom glands.
As of October 2023[update], the World Uropygi Catalog accepts the following twenty-fives species:[1]