|Scientific Name:||Oxynaia diespiter|
|Species Authority:||Mabille, 1887|
|Red List Category & Criteria:||Endangered A2ac ver 3.1|
|Reviewer/s:||Van Damme, D., Bogan, A., Tran, L. & García, 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.
|Range Description:||This species is distributed only in Thai Nguyen and Bac Kan provinces in northeastern Viet Nam.|
|Range Map:||Click here to open the map viewer and explore range.|
|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).|
|Habitat and Ecology:||This species inhabits streams and rivers in midlands and mountains.|
Mining is the major threat to this species, and urbanization, overexploitation, deforestation and also threaten the survival of this species.
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.
Bogan, A.E. 1993. Freshwater Bivalve Extinctions (Mollusca: Unionoida): A Search for Causes. American Zoologist 33(6): 599-609.
Brandt, R.A.M. 1974. The non-marine aquatic Mollusca of Thailand. Archiv für Molluskenkunde 105(1-4): 1-423.
Ðặng, N.T., Thai, T.B. and Phạm, V.M. 1980. Ðịnh loại động vật không xương sống nước ngọt Bắc Việt Nam [Classification of the fresh water invertebrate in Viet Nam]. Nhà Xuất bản Khoa học và Kỹ thuật [Science Publishing House], Ha Noi.
IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: http://www.iucnredlist.org. (Accessed: 16 June 2011).
McMahon, R.F. and Bogan, A.E. 2001. Mollusca: Bivalvia. In: J.H. Thorp and A.P. Covich (eds), Ecology and Classification of North American Freshwater Invertebrates, pp. 331–430. Academic Press, San Diego.
|Citation:||Do, V. 2011. Oxynaia diespiter. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 24 May 2013.|
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