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Description |
Geographic Range [top]
Range Description:
Merogomphus parvus is known from Sumatra (e.g. Krüger 1898, Lieftinck 1941), Peninsular Malaysia (Lieftinck 1964, Hämäläinen et al 1996, Orr 2005), Thailand (Asahina 1981; Kitagawa and Ichii 1999; Kitagawa and Katatani 2002, 2005), Myanmar (Asahina 1970), Vietnam (Asahina 1969), Laos (Yokoi 1999, Sasamoto and Honda 2003, Yokoi and Souphanthong 2004). The record from Laos from Yokoi and Souphanthong 2004 is from close to the Chinese border; this species is likely to occur in southwestern China as well, and should be looked for in Cambodia.
Countries occurrence:
Native:
Indonesia (Sumatera); Lao Peoples Democratic Republic; Malaysia (Peninsular Malaysia); Myanmar (Myanmar (mainland)); Thailand; Viet Nam
Additional data:
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population:
Most records of Merogomphus parvus are of one or a few individuals, but this is typical of tropical and subtropical forest stream gomphids. Although the currently available data is insufficient to make any estimates about population sizes past or present, there is no reason to suppose that this species is currently suffering any strong decline.
Current Population Trend: Unknown
Additional data:
? Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology:
Lieftinck (1941) gives the habitat where he found this species in Sumatra as "small clear streams with a sandy or somewhat gravelly bottom." Later (1954) he gave the habitat as "hill forest streams". Hämäläinen et al. (1996) recorded it from a logged over forest, consisting mostly of wild banana and bamboo, with 40% canopy cover. I have found this species on a stream in highly disturbed riparian forest surrounded by agricultural land in Chiang Mai, north west Thailand. Orr (2005) gives the habitat as forest streams and notes that the larvae "burrows in gravel". This species is clearly capable of breeding in a variety of lowland forest streams, including heavily disturbed ones.
Systems: Terrestrial; Freshwater
Threats [top]
Major Threat(s):
The major threat that is likely to be faced by this species is clear-felling of large areas of forest. As it is tolerant of disturbance, it might be able to survive in plantation streams, but until this has been established, large scale plantation establishment must also be regarded as a threat, albeit one that could easily be avoided by leaving adequate buffer zones of original forest around plantation streams.
Conservation Actions [top]
Conservation Actions:
No particular conservation measures appear to be needed for Merogomphus parvus at the present time, although there is a need for more data.
Citation: Dow, R.A. 2010. Merogomphus parvus. The IUCN Red List of Threatened Species 2010: e.T167476A6354326. http://dx.doi.org/10.2305/IUCN.UK.2010-4.RLTS.T167476A6354326.en. Downloaded on 19 August 2016.
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