The species is recorded throughout eastern slopes of the Gulf of Thailand and Cambodia. It is impacted through trade, but populations are considered to be stable and it is considered Least Concern.
IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: http://www.iucnredlist.org. (Accessed: 19 June 2012).
Kottelat, M. 1985. Fresh-water fishes of Kampuchea. Hydrobiologia 121: 249-279.
Kottelat, M. and Witte, K. E. 1999. Two new species of Microrasbora from Thailand and Myanmar, with two new generic names for small southeast Asian cyprinid fishes (Teleostei: Cyprinidae). Journal of South Asian Natural History: 49-56.
Rainboth, W.J. 1996. Fishes of the Cambodian Mekong.
Vidthayanon, C. 2012. Trigonostigma espei. The IUCN Red List of Threatened Species 2012: e.T188094A1853376. . Downloaded on 04 December 2016.
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