Order Artiodactyla Author James H. Honacki Author Kenneth E. Kinman Author James W. Koeppl text 1982 Alien Press, Inc. & The Association of Systematics Collections Lawrence, Kansas, USA Editor James H. Honacki Editor Kenneth E. Kinman Editor James W. Koeppl Mammal Species of the World (1 st Edition) 315 343 book chapter http://doi.org/10.5281/zenodo.7352976 d2154b0a-e0b7-4b56-bb6c-61d84ce4d9e1 0-89327-235-3 7352976 Cephalophus callipygus Peters, 1876 . Monatsb. Preuss. Akad. Wiss. Berlin , p. 483 , pl. 3,4. TYPE LOCALITY: Gabon . DISTRIBUTION: West of Congo and Ubangi Rivers in Congo Republic ; Central African Republic ; Zaire ; Gabon and Cameroun . COMMENT: Possibly conspecific with natalensis and / or adersi ; see Ansell, 1972 , Part 15:33. According to Groves and Grubb, 1974 , Rev. Zool. Afr., 88: 189- 196, not related to natalensis . ISIS NUMBER: 5301419009009002001.