Whip-scorpion
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.
Mastigoproctus cinteotl
Mastigoproctus cinteotl is a species of vinegaroon (whip scorpion) in the family Thelyphonidae, described in 2018. It belongs to a genus of large, primarily nocturnal arachnids found in the Americas. Like other vinegaroons, it possesses a pair of elongated, whip-like front legs used as sensory appendages, and can discharge a defensive spray of acetic acid from glands at the base of the tail. The species is part of a group often kept in captivity for educational purposes due to their docile nature and distinctive appearance.
Mastigoproctus floridanus
Florida vinegaroon
Mastigoproctus floridanus, commonly known as the Florida vinegaroon, is a species of whip scorpion (order Uropygi) in the family Thelyphonidae. It is native to Florida and represents one of several vinegaroon species found in North America. Like other vinegaroons, it possesses a pair of large pedipalps modified into pincers and a long, whip-like flagellum used for sensory detection. The species is primarily nocturnal and, when disturbed, can spray a defensive secretion containing acetic acid from glands at the base of the flagellum, producing a vinegar-like odor.
Mastigoproctus giganteus
giant whip scorpion, giant vinegaroon, grampus, Texas giant vinegaroon
Mastigoproctus giganteus is a large arachnid in the order Uropygi, commonly known as the giant whip scorpion or vinegaroon. It is the only member of family Thelyphonidae found in the United States, occurring from the southern U.S. through Mexico. The species is nocturnal and occupies humid microhabitats in arid and semi-arid environments. It is notable for its ability to spray a defensive secretion containing 85% acetic acid, which produces a strong vinegar-like odor. The species is long-lived, with females producing a single brood of approximately 40 offspring that receive extended maternal care.
Mastigoproctus tohono
Tohono whipscorpion, Tohono vinegaroon
Mastigoproctus tohono is a species of whip scorpion (order Uropygi) described in 2018 from populations previously attributed to Mastigoproctus giganteus. It is distinguished by specific setal patterns and epistoma positioning. The species produces acetic acid spray as a chemical defense, creating a vinegar-like odor. It inhabits arid regions of the southwestern United States and northern Mexico.