Ptychochromis
''Ptychochromis'' is a genus of cichlids endemic to rivers and lakes in Madagascar. One species ('' P. grandidieri'') can also be seen in brackish water.Stiassny, M.L.J. & Sparks, J.S. (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, 3535: 1-56.'' 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, 2006 * '' Ptychochromis ernestmagnusi'' Sparks & Stiassny, 2010 * '' Ptychochromis grandidieri'' Sauvage, 1882 * ...
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