''Euphrictus spinosus'' is a

tarantula Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. , 1,100 species have been identified, with 166 genera. The term "tarantula" is usually used to describe members of the family Theraphosidae, although ...

(family Theraphosidae), subfamily Selenogyrinae, first described by A.S. Hirst in 1908. It is only known from the male, and from the Dja River,

Cameroon Cameroon, officially the Republic of Cameroon, is a country in Central Africa. It shares boundaries with Nigeria to the west and north, Chad to the northeast, the Central African Republic to the east, and Equatorial Guinea, Gabon, and the R ...

Description

Only the male is known. ''Euphrictus spinosus'' is distinguished by having 7–8 spines on the tibia of the first leg; having a yellowish

carapace A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the unde ...

and a brown abdomen with long bright yellow hairs; and a long tapering

embolus An embolus (; : emboli; from the Greek ἔμβολος "wedge", "plug") is an unattached mass that travels through the circulatory system, bloodstream and is capable of creating blockages. When an embolus Vascular occlusion, occludes a blood vess ...

with a slight twist in the middle. Its body is 15.5 mm long and it has a stridulating organ between its

chelicera The chelicerae () are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders. Commonly referred to as "jaws", chelicerae may be shaped as either articulated fangs, or as a type ...

. It also lacks a clypeus.

References

Endemic fauna of Cameroon Invertebrates of Cameroon Theraphosidae Spiders of Africa Spiders described in 1908 {{Theraphosidae-stub