Uropygian
Guides
Mastigoproctus
whip scorpion, vinegaroon
Mastigoproctus is a genus of large whip scorpions (vinegaroons) in the family Thelyphonidae. These arachnids are characterized by their elongated antenniform front legs, robust pedipalps, and ability to spray defensive acetic acid. The genus includes approximately 25 accepted species distributed across the Americas, from the southwestern United States through Mexico, Central America, the Caribbean, and into northern South America. Despite their intimidating appearance, they are not venomous and lack venom glands entirely.