Oxylapia polli


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Oxylapia polli
Species Authority: Kiener & Maugé, 1966

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(i,iii) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Loiselle, P. & participants of the CBSG/ANGAP CAMP "Faune de Madagascar" workshop, Mantasoa, Madagascar 2001
Reviewer(s): Stiassny, M.L.J., Sparks, J.S. (AMNH, New York) & Darwall, W (Freshwater Biodiversity Assessment Programme)
Oxylapia polli previously was listed as Vulnerable. Improved information since then has resuled in the species being uplisted to Critically Endangered.

This species has been reported from the rapids and rocky areas within the Nosivolo river, a tributary of the Mangoro river. Although this species is abundant, it has an extent of occurrence of less than 100 km², and is found at only one location (see IUCN 2001 for definition of location). Oxylapia polli is also subject to a continued decline in habitat due to deforestation. It therefore qualifies as Critically Endangered.
1996 Vulnerable

Geographic Range [top]

Range Description: Known only from the Marolambo Rapids, Nosivolo River, a tributary of the Mangoro River.
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: A riverine species.
Systems: Freshwater

Threats [top]

Major Threat(s): The species' restricted range makes it particularly susceptible to habitat loss and degradation through siltation caused by deforestation.

Citation: Loiselle, P. & participants of the CBSG/ANGAP CAMP "Faune de Madagascar" workshop, Mantasoa, Madagascar 2001 2004. Oxylapia polli. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 28 August 2015.
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