Coba jelasin Pseudohaje nigra (Günther, 1858) dari Pseudohaje dong

P. nigra berwarna kehitaman pada bagian dorsal dan berwarna kecokelatan pada bagian bawah tubuh (ventral). Panjang tubuhnya mencapai 2.13 meter.

Jenis ini tersebar di Sierra Leone, Liberia, Ivory Coast, Togo, Ghana, Guinea (Conakry), dan Nigeria.

Günther A. 1858. Catalogue of the Colubrine Snakes in the Collection of the British Museum. London: Trustees of the British Museum. (Taylor and Francis, printers). xvi + 281 pp. (Pseudohaje, new genus, p. 222).

Boulenger GA (1895). "On some new or little-known Reptiles obtained by W. H. Crosse, Esq., on the Niger". Ann. Mag. Nat. Hist., Sixth Series 16: 32-34. (Naia goldii, new species, p. 34).

Boulenger GA (1896). Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ) ... London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 727 pp. + Plates I-XXV. (Naia goldii, pp. 387–388 + Plate XX, figure 2).

O'Shea, Mark; Halliday, Tim (2002). Reptiles and Amphibians: Smithsonian Handbooks. London: Dorling Kindersley (DK). 256 pp. .

Günther A. 1858. Catalogue of the Colubrine Snakes in the Collection of the British Museum. London: Trustees of the British Museum. (Taylor and Francis, printers). xvi + 281 pp. (Pseudohaje nigra, new species, p. 222).