Lanceolaria bilirata 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Bivalvia Unionoida Unionidae

Scientific Name: Lanceolaria bilirata von Martens, 1902
Taxonomic Notes: It has been used as a subspecies of Lanceolaria oxyrhyncha Von Martens, 1902 of Japan ( (Haas 1969).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(i,ii,iii,v)+2ab(i,ii,iii,v) ver 3.1
Year Published: 2011
Date Assessed: 2010-12-03
Assessor(s): Do, V.
Reviewer(s): Van Damme, D., Bogan, A.E., Tran, L.D. & GarcĂ­a, N.
Lanceolaria bilirata is known at global level only from one location in Viet Nam, where it is threatened by over-harvesting for food, mining, water pollution and deforestation, which are believed to be  in the cause of the observed decline in populations. Its distribution area is very small (less than 10 km2) and therefore it qualifies for the category Critically Endangered.

Geographic Range [top]

Range Description:This species is distributed only in northeast Viet Nam where it is known from Bang River in Cao Bang province.
Countries occurrence:
Viet Nam
Additional data:
Estimated area of occupancy (AOO) - km2:9
Number of Locations:1
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. Surveys conducted indicate observed declines in population (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.

Use and Trade [top]

Use and Trade: Local people use freshwater mussels as a ready food source, so the mussels are often caught and sold in the markets.

Threats [top]

Major Threat(s):

The main threats to this species are overexploitation, water pollution, mining  and deforestation.

Conservation Actions [top]

Conservation Actions: Surveys need to be conducted in Bang river in northeast 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. Lanceolaria bilirata. The IUCN Red List of Threatened Species 2011: e.T171849A6807323. . Downloaded on 21 April 2018.
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