Stasimopus castaneus

Stasimopus castaneus is known only from a female. The carapace is dark brown, only slightly paler posteriorly. The chelicerae, pedipalps, and legs are dark reddish brown, with the two posterior pairs of legs paler and more yellowish below. The sternum is dark brown, pale yellowish posteriorly. The opisthosoma is dirty yellowish.

Stasimopus castaneus is found in the Eastern Cape province of South Africa. It is known only from the type locality at Port Elizabeth at an altitude of 17 m above sea level.

The species is a ground dweller that lives in silk-lined burrows closed with a thick trapdoor lid. It has been sampled in the Thicket biome.