- Stiassny, Melanie & John S. Sparks. 2006. "Phylogeny and Taxonomic Revision of the Endemic Malagasy Genus Ptychochromis (Teleostei: Cichlidae), with the Description of Five New Species and a Diagnosis for Katria, New Genus". American Museum Novitates. (n. 3535); pp. 1–55 (crc01327) (abstract).
Type species: Ptychochromoides katria Reinthal & Stiassny, 1997 (original designation).
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Described species included (1):
- Ptychochromoides katria Reinthal & Stiassny, 1997 (valid)