Oxynaia diespiter 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Bivalvia Unionoida Unionidae

Scientific Name: Oxynaia diespiter Mabille, 1887

Assessment Information [top]

Red List Category & Criteria: Endangered A2ac 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.D. & GarcĂ­a, N.
Following the information from surveys conducted in the area in the past 20 years, populations of this species has been observed to be declining. A decline of about 70% of the populations is inferred for the last 10 years. The quality of its habitat is also known to be declining as a result of threats as pollution and mining. It is therefore listed as Endangered A2c.

Geographic Range [top]

Range Description:This species is distributed only in Thai Nguyen and Bac Kan provinces in northeastern Viet Nam.
Countries occurrence:
Viet Nam
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is not common and there is very little information on its population. A decline of about 70% of the populations is inferred for the last 10 years based on the observations of the Can and Nhue-Day Rivers Monitoring Program (V. 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.
Generation Length (years):8

Use and Trade [top]

Use and Trade: Local people use freshwater mussels as a ready food source and this species is sometimes also sold in markets.

Threats [top]

Major Threat(s):

Mining is the major threat to this species, and urbanization, overexploitation, deforestation and also threaten the survival of this species.

Conservation Actions [top]

Conservation Actions:

Surveys need to be conducted in Thai Nguyen and Bac Kan 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 important habitats from direct and indirect impacts, and preventing exploitation of this species.

Citation: Do, V. 2011. Oxynaia diespiter. The IUCN Red List of Threatened Species 2011: e.T171855A6807648. . Downloaded on 24 June 2018.
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