Keywords: Cephalophus nigrifrons Gray 1871.jpg of two new species from Gaboon Proceedings of the Zoological Society 1871 pp 588 “601 pl 46 http //www biodiversitylibrary org/item/90542 page/702/mode/1up J Smit possible Joseph Smit 1836 “1929 1871 Cephalophus nigrifrons PD-old |