| Ptychochromis | |
|---|---|
 Ptychochromis oligacanthus | |
| Scientific Classification | |
| Kingdom | Animalia |
| Phylum | Chordata |
| Class | Actinopterygii |
| Order | Perciformes |
| Family | Cichlidae Ptychochrominae |
| Genus | Ptychochromis |
Ptychochromis is a genus of cichlids endemic to rivers and lakes in Madagascar. One species, like Ptychochromis grandidieri can also be seen in brackish water. Most species in this genus are threatened, and Ptychochromis onilahy is probably extinct. Most reach a length of 12–15 cm (4.7–5.9 in), but Ptychochromis insolitus only reaches 5.5 cm (2.2 in), while Ptychochromis grandidieri and Ptychochromis oligacanthus reach 21–25 cm (8.3–9.8 in).
Species
The currently nine recognized species in this genus are:
Ptychochromis curvidens (Stiassny & Sparks, 2006) Ptychochromis ernestmagnusi (Sparks & Stiassny, 2010) Ptychochromis grandidieri (Sauvage, 1882) Ptychochromis inornatus (Sparks, 2002) Ptychochromis insolitus (Stiassny & Sparks, 2006) (Mangarahara Cichlid) Ptychochromis loisellei (Stiassny & Sparks, 2006) Ptychochromis makira (Stiassny & Sparks, 2006) Ptychochromis oligacanthus (Bleeker, 1868) †Ptychochromis onilahy (Stiassny & Sparks, 2006)
Additionally, cichlids from the eastern Anosy Region in far southeastern Madagascar may actually represent two undescribed species, popularly known as Ptychochromis sp. "Tarantsy" and Ptychochromis sp. "Manampanihy".