Oxynaia micheloti 

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
Animalia	Mollusca	Bivalvia	Unionoida	Unionidae

Scientific Name:	Oxynaia micheloti
Species Authority:	Morelet, 1886
Synonym(s):	Unio gladiator Ancey, 1881 Unio micheloti Morelet, 1886
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria:	Endangered A2c ver 3.1
Year Published:	2011
Date Assessed:	2010-11-15
Assessor(s):	Do, V.
Reviewer(s):	Van Damme, D., Bogan, A.E., Tran, L. & García, N.
Justification: The species has a wide distribution in Viet Nam. Overexplotation, mining, water pollution and deforestation are major threats affecting its population and the number of locations is fewer than 10. Population decline has been observed through surveys during the last 20 years and is inferred to be approximately 50% in the last 10 years (Do pers. comm. 2011). Surveys need to be conducted in order to follow up the status of this species.

Geographic Range [top]

Range Description:	This species is distributed in Cao Bang, Phu Tho, and Vinh Phuc provinces in northeastern Viet Nam.
Countries occurrence:	Native: Viet Nam
Additional data:	♦ Number of Locations: 5-7
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	This species is not common. Population decline has been observed through surveys during the last 20 years and is inferred to be approximately 50% in the last 10 years (Do pers. comm. 2011).
Current Population Trend:	Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:	This species inhabits streams and rivers in midlands and mountains.
Systems:	Freshwater
Generation Length (years):	8

Use and Trade [top]

Use and Trade:

As many other mussels, this species is used as a ready food source for local people, poultry, livestock and fish and is sometimes also seen in local markets.

Threats [top]

Major Threat(s):

Overexploitation, deforestation and mining threaten the survival of this species.

Conservation Actions [top]

Conservation Actions:

Surveys need to be conducted in Cao Bang, Phu Tho, Vinh Phuc provinces in Viet Nam  to obtain information on the population, distribution and ecological requirements of this species. Conservation actions which are needed include protection of its habitats from direct and indirect impacts, and preventing exploitation of this species.