ADW: Cephalophus niger: Classification: Cephalophus niger (black duiker). ... Parent taxa. pictures specimens. Genus Cephalophus
http://animaldiversity.ummz.umich.edu/site/accounts/classification/Cephalophus_niger.html

ADW: Cephalophinae: Classification: ...duiker). Species Cephalophus natalensis (Natal duiker). information pictures.
http://animaldiversity.ummz.umich.edu/site/accounts/classification/Cephalophinae.html

Taï NP - Fauna: Bovidae, Cephalophus, maxvelli, Maxwell's duiker, 4:481. Bovidae, Cephalophus, niger,
http://weber.ucsd.edu/~jmoore/apesites/Tai/TaiFauna.html