The High-mountain goblin spider (Unicorn catleyi) is a species of goblin spiders(family:Oonopidae) ,(family Oonopidae) from South America. containing seven species that occur predominantly in dry, high elevation regions of Bolivia, Chile, and Argentina. Individuals are relatively large for goblin spiders, measuring up to 3.0mm (0.12in) in body length. The genus name (Latin for "one horn") refers to a characteristic pointed projection between the eyes and jaws, the clypeal horn, possessed by males. In at least one species, broken-off tips of the male pedipalps have been found within the genitalia of females, postulated as a means of sperm competition. Unicorn possesses several traits that suggest it is a relatively "primitive" member of the Oonopidae, and is classified with other similar, soft-bodied goblin spiders in the subfamily Sulsulinae.