Plexippus fibulatus

Plexippus fibulatus is a medium-sized spider, with a cephalothorax that measures between 2.9 and 3.3 mm (0.11 and 0.13 in) in length and between 2.5 and 2.6 mm (0.098 and 0.102 in) in width. The carapace is dark brown and moderately high. It is covered in brown hairs, apart from a set of wide streaks made of white hairs. The eye field is slightly darker. The clypeus is dark brown and covered with transparent hairs. The labium is also brown. The dark brown abdomen is between 2.9 and 3.3 mm (0.11 and 0.13 in) long and between 2 and 2.1 mm (0.079 and 0.083 in) wide. It has the shape of an elongated oval and is marked with a pattern consisting of a light-coloured streak and chevrons. The hairs that cover it match the underlying colour. The underside is dark with stripes on the edges. The spinnerets are light brown. The legs and pedipalps are also brown and hairy, but the hairs are white and brown. the embolus is short and the tibial apophysis, or appendage, is thin and resembles a spike, as is recalled in the species name. Only the male has been described. Plexippus fibulatus can be clearly distinguished from other spiders in the genus. The species does not resemble other Plexippus spiders in the colours or shape of its body species, particularly its proportions. …

Plexippus fibulatus is endemic to Kenya, The male holotype was identified near Mount Elgon and the Turkwel River. It is known only from that area of the country. The examples that have been identified are in a collection owned by the Swedish arachnologist Åke Holm and are held at Uppsala University.