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Oxylapia polli : ウィキペディア英語版 | Oxylapia polli
''Oxylapia polli'', known locally as the songatana, is a critically endangered species of fish in the cichlid family, and the only member of its genus. It is endemic to the Marolambo Rapids in the Nosivolo River (a tributary of the Mangoro River) in east-central Madagascar. It is threatened by habitat loss and sedimentation caused by deforestation.〔 The only other single-species cichlid genus in Madagascar is ''Katria'', and it is restricted to the same region as ''Oxylapia''. In 2010, the Nosivolo River was designated as a Ramsar Site.〔Durrell Wildlife Conservation Trust (20 September 2010). ''(Nosivolo is designated as Madagascar's first riverine Ramsar site. )'' Accessed 14 July 2011〕 The ''Oxylapia'' is the conservation flagship species for the district capital Marolambo.〔 ''Oxylapia'' is a highly aggressive, elongate species that reaches about in length.〔〔de Rham, P. (1996). ''(Oxylapia polli, the enigmatic cichlid of the Nosivolo River. )'' Accessed 14 July 2011〕 It is the Malagasy cichlid most adapted to rheophilic conditions, but not the only (members of the lamena group in the genus ''Paretroplus'' are also rheophilic).〔 ==References==
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