Ammodesmidae
Ammodesmidae is a family of small millipedes endemic to Africa, containing seven species in two genera. Ammodesmids range from Ammodesmidae contains two genera: "Ammodesmus", with three species known from West Africa and the Democratic Republic of Congo, and "Elassystremma", with four species known from East Africa. Adult "Ammodesmus" range from 1.4–2 mm in length, and adult males possess a last pair of legs strongly modified: bearing long whip-like bristles (setae) and with vestigial claws. Males of the genus "Elassystremma" lack the modified rear legs, and are larger, from 3.3–5 mm. Section::::"Ammodesmus". The genus "Ammodesmus" was named in 1896  by Orator F. Cook in the description of "Ammodesmus granum". The genus was thought restricted to West Africa (Guinea, Liberia and Ivory Coast) until the 2015 description of "A. congoensis" from the Democratic Republic of the Congo. "A. congoensis" differs from the other two speciesin lacking ozopores (defensive glands), and has conspicuous sexual dimorphism, with females bearing sparse, long setae. Section::::"Elassystremma". The genus "Elassystremma" was established in 1981 by Richard L. Hoffman and K. M. Howell. Four species are known, occurring in Kenya, Tanzania, and Malawi.