Original description as Melanochromis perileucos:
- Bowers, Nancy & J. Stauffer. 1997. "Eight new species of rock-dwelling cichlids of the genus Melanochromis (Teleostei: Cichlidae) from Lake Malawi, Africa". Ichthyological Explorations of Freshwaters. v. 8 (1); pp. 49-70 (crc00126)
Conservation: Pseudotropheus perileucos is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (VU) vulnerable (2006).