Original description as Placidochromis elongatus:
ZooBank:DAB9172C-499C-4B80-A291-250359F1C7A6.
- Hanssens, Mark. 2004. "The deep-water Placidochromis species". In: J. Snoeks (ed.), The Cichlid Diversity of Lake Malawi, Identification, Distribution and Taxonomy. 104-196 (crc01165)
Conservation: Placidochromis elongatus is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2018).