Original description as Haplochromis insignis:
- Trewavas, Ethelwynn. 1935. "A Synopsis of the Cichlid Fishes of Lake Nyasa". Annals and Magazine of Natural History. Series 10; pp. 65-118 (crc00118)
Conservation: Protomelas insignis is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2018). As is common for specialist predatory cichlids Protomelas insignis is nowhere common in the lake and there are no indications that this species is threatened by over-fishing anywhere in the lake.