Original reference as:
- Konings, Ad. 1989. "Malawi cichlids in their natural habitat". Verduijn Cichlids, Rotterdam, Netherlands. 303 pp (crc01495)
Conservation: Protomelas sp. 'johnstoni solo' is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species. Protomelas sp. 'johnstoni solo' is a rather rare species which is more common along the eastern shore of the lake.