Ptychochromis onilahy Stiassny & Sparks, 2006

Onilahy River cichlid (proposed)



Taxonomy & Nomenclature

Ptychochromis sp. nov. 'Kotro'


Conservation Status


Last record: 1962

IUCN RedList status: Extinct



Onilahy River, Madagascar (south-western)


Biology & Ecology




Holotype: AMNH 237131 (adult, sex unspecified)


Only five specimens, all from the type series, exist in museums.






Original scientific description:

Stiassny, Melanie L. J. and Sparks, John 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, Number 3535, 55 pp., 26 figures, 2 plates, 11 tables.


Other references:

Kiener, A. 1963. Poissons, pêche et pisciculture à Madagascar. Publication no. 24 du Centre Technique Forestier Tropical, Nogent-sur-Marne, France.

Loiselle, P. & participants of the CBSG/ANGAP CAMP "Faune de Madagascar" workshop, Mantasoa, Madagascar 2001. (2004). Ptychochromis sp. nov. 'Kotro'. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. ( Downloaded on 31 May 2013.

Máiz-Tomé, L., Sayer, C. and Darwall, W. (eds.). (2018). The status and distribution of freshwater biodiversity in Madagascar and the Indian Ocean islands hotspot. Gland, Switzerland: IUCN. viii + 128 pp.

Sparks, J.S. 2016. Ptychochromis onilahy. The IUCN Red List of Threatened Species 2016: e.T44504A58308545. Downloaded on 03 March 2018.


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