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Mainland drill, Mandrillus leucophaeus leucophaeus; Bioko drill, Mandrillus leucophaeus poensis; Their closest relative is the mandrill (Mandrillus sphinx), found from southern Cameroon through mainland Equatorial Guinea (Rio Muni), Gabon and into the Congo. The two species are allopatric across the Sanaga River.
Mandrillus is a genus of large Old World monkeys distributed throughout central and southern Africa, consisting of two species: M. sphinx and M. leucophaeus, the mandrill and drill, respectively. [4] Mandrillus , originally placed under the genus Papio as a type of baboon , is closely related to the genus Cercocebus . [ 5 ]
The mainland drill (Mandrillus leucophaeus leucophaeus) is a subspecies of the endangered drill. It is distinguished by ringed yellow and black coloring on its crown, and is otherwise similar to the Bioko drill.
The Bioko drill (Mandrillus leucophaeus poensis) is a subspecies of the drill, an Old World monkey. It is endemic to Bioko Island, Equatorial Guinea, [4] located off the west coast of Africa. [5] The drill is one of the largest monkey species, and is considered endangered. [5]
The Afi Mountain Wildlife Sanctuary in Cross River State in southern Nigeria covers 104 km 2 (40 sq mi). [1] The wildlife sanctuary was founded in 2000 to provide refuge for endangered animal species, including the Cross River gorilla, the Nigeria-Cameroon chimpanzee, the drill and the gray-necked rockfowl.
Genus Mandrillus – Ritgen, 1824 – two species ... IUCN status and estimated population Drill. M. leucophaeus (F. Cuvier, 1807) Two subspecies. M. l. leucophaeus ...
The mandrill has a stocky body with a large head and muzzle, as well as a short and stumpy tail. [19] The limbs are evenly sized and the fingers and toes are more elongated than those in baboons, [20] with a more opposable big toe on the feet. [21] The mandrill is the most sexually dimorphic primate, [22] and it is the largest monkey. [23]
Mandrillus leucophaeus Drill Mandrillus leucophaeus: 2000 Cameroon Equatorial Guinea (Bioko) Nigeria unknown Endangered [52] small range; loss of habitat (clearcutting [for chipboard factories and settlement]) hunting (bushmeat, persecution as pests) [52] Tana River mangabey Cercocebus galeritus galeritus: 2002 Kenya 1,000–1,200 [53 ...