Ptychochromis
Ptychochromis is a genus of cichlids endemic to rivers and lakes in Madagascar. One species can also be seen in brackish water. Most species in this genus are threatened, and P. onilahy is probably extinct. Most reach a length of, but P. insolitus reaches, while P. grandidieri and P. oligacanthus reach and respectively. The largest species was P. onilahy which may have reached as much as if reports of fishermen are to be believed.
Species
There are currently 10 recognized species in this genus:Ptychochromis curvidens Stiassny & Sparks, 2006Ptychochromis ernestmagnusi Sparks & Stiassny, 2010Ptychochromis grandidieri Sauvage, 1882Ptychochromis inornatus Sparks, 2002Ptychochromis insolitus Stiassny & Sparks, 2006Ptychochromis loisellei Stiassny & Sparks, 2006Ptychochromis makira Stiassny & Sparks, 2006Ptychochromis mainty C. M. Martinez, Arroyave-Gutiérrez & Sparks, 2015Ptychochromis oligacanthus- † Ptychochromis onilahy Stiassny & Sparks, 2006