What arachnid order is known as short-tailed whipscorpions?

The arachnid order known as short-tailed whipscorpions is Schizomida.

Schizomids are tiny, soft-bodied relatives of whip scorpions, generally measuring less than 5 millimetres. They live mostly in tropical and subtropical habitats, especially humid leaf litter, caves, rotten logs, and soil beneath rocks. Their common name refers to the short, whip-like flagellum at the end of the abdomen.

The name Schizomida means “split or cleaved middle,” describing the division of the front body region into separate plates. These animals use only six legs for walking: the first pair is modified into sensory organs, while the pedipalps form small pincers used in handling prey. Their hind legs can assist with jumping when they are threatened.

Schizomids are predators of other small arthropods and have no true eyes, although some species retain light-sensitive eyespots. About 300 species have been described, most in the family Hubbardiidae. Their closest major relative is Uropygi, the order containing the better-known, long-tailed whip scorpions, so the two groups are easy to confuse.