Original description as Haplochromis plagiostoma:
ZooBank:F9E7BC23-5FDD-41F8-B354-F24AE521BBCF.
- Regan, Charles Tate. 1922. "The Cichlid Fishes of Lake Victoria". Proceedings of the Zoological Society of London. v. 1: pp. 157-191 (crc00355)
Conservation: Haplochromis plagiostoma is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (DD) data deficient (2010).