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Uropygi (Thelyphonida, Uropygida)
whip scorpions, vinegaroons
low
No known importance, although some species are used in the pet trade and may have small, threatened populations.
None other than general arachnid features. Whip scorpions are much larger than mites, have clearly segmented opisthosomas, and a long posterior flagellum.
Normal adult length: >2 cm
Body tagmata: prosoma, opisthosoma, telson (flagellum)
Eyes: 2–4 pairs of lateral ocelli
Antennae: absent
Mouthparts: 2-segmented fang-like chelicerae; robust, raptorial 5-segmented palps with distal claws
Legs: 4 pairs; legs I antenniform
Distinguishing features: segmented opisthosoma, stabbing chelicerae, long flagellum ('tail'), acetic acid defensive spray (vinegaroons)
1 family, 16 genera, >103 species