Leptorchestes algerinus

Leptorchestes are relatively small ant-like spiders. Their body is divided into two main parts: a cephalothorax and an abdomen. The male carapace, the hard upper part of the cephalothorax, is a dark brown oval that is typically 3.2 mm (0.13 in) long and 1.3 mm (0.05 in) wide. There are a few short greyish-brown hairs on its back and long bristles near its first row of eyes. The underside of its cephalothorax, or sternum, is a wide light brown oval. The spider's clypeus is low and dark browns. Its mouthparts are distinctive. It has long brown chelicerae that have two teeth on their front front margin and a row of hairs instead of teeth to the rear. Its labium is dark brown and wide with dark patches visible on the sides and its maxillae, are light brown with white patches of its inside edge. The male's abdomen is typically 2.6 mm (0.10 in) long and 1.4 mm (0.06 in) wide. It is a dark brown oval that is fatter near the back with a gently rounded end. It has a narrower part in the middle that is marked with a line of white hairs that stretches around to the light brown underside of the abdomen. It is otherwise covered in brown and grey hairs. The spider has large book lung covers that show evidence of sclerotization. It has a moderately long pedicel between its carapace and abdomen. Its spinnerets and pedipalps are all brown. …

Leptorchestes spiders live in the Afrotropical and Palearctic realms. Leptorchestes algerinus is endemic to Algeria, which is where its specific name comes from. The holotype was found in Ghazaouet. Leptorchestes species are typically ground-dwelling spiders.