Microgomphus wijaya 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Odonata Gomphidae

Scientific Name: Microgomphus wijaya Lieftinck, 1940

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2009
Date Assessed: 2007-09-20
Assessor(s): Bedjanič, M.
Reviewer(s): Kalkman, V. & Clausnitzer, V. (Odonata Red List Authority)
Rare and taxonomically interesting species. Recently known from only few localities (less than 10) in central and southwestern part of the island. Extent of occurrence estimated at less than 20,000 km², but the area of occupancy is estimated at less than 500 km². Its habitat - rivers and streams with rich surrounding vegetation in mid-hills is fragmented and under threat.

Additional exhaustive faunistic survey made by odonatologists and covering appropriate localities in different seasons is urgently needed.
Previously published Red List assessments:

Geographic Range [top]

Range Description:The species is found in Sri Lanka and is a rare endemic species. Recently known from only few localities in southwestern and central part of the island.
Some individuals present in large odonatological collection made by Naturhistorischen Museum Basle (Switzerland) and National Museum of Natural History - Smithsonian Institution (USA) (museum collections accessed by M. Bedjanic between 2005-2009). Also found during the author’s surveys in last years (2001, 2003).
Countries occurrence:
Sri Lanka
Additional data:
Estimated area of occupancy (AOO) - km2:1-499
Number of Locations:1-9
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Detailed population numbers and trend are unknown but thought to be small and fragmented.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:The species inhabits rivers and streams with rich surrounding vegetation in mid-hills.

Threats [top]

Major Threat(s): Rivers and streams with rich surrounding vegetation in mid-hills are the type of habitat under treat. Destruction of primary and secondary rainforests, destruction of forest corridors along streams, pollution and other pressures on streams and rivers in the southwestern and central part of Sri Lanka are the major threat for exceptionally rich endemic dragonfly fauna of the island.

Conservation Actions [top]

Conservation Actions:

Apart from the general conservation guidelines, no "site specific single-species-oriented” conservation measures can be proposed for the moment.  General guidelines for protection of rich endemic dragonfly fauna of Sri Lanka include (1) establishment of network of new small protected areas and corridors in the 'wet zone' (mountains and the southwestern part of the country), (2) conservation of forest corridors along streams and rivulets outside protected areas in the wet zone and (3) effective execution of appropriate nature conservation measures in partly damaged declared protected areas (Bedjanic 2004).

General note: Knowledge on distribution, biology and taxonomy of several endangered endemic dragonfly species from Sri Lanka is very poor or insufficient. In the future special attention should be devoted to the work dealing with taxonomy of larval forms and adults. Serious odonatological faunistic mapping should cover the whole island and should be urgently focused on still preserved and protected areas. Simultaneously also the research of biology and ecology of selected endangered species should be carried out. As far as species habitat and potential area of occurrence is concerned the Sri Lankan Moist Forests (Ecoregion 21: Sri Lanka lowland rain forests (IM0154)) and South-western Sri Lanka Rivers and Streams (Ecoregion 172) are included in the prestigious WWF’s global 200 list of the earth’s most biologically outstanding habitats. The conservation status of the ecoregions is judged as critical/endangered (Ecoregion 21) and vulnerable (Ecoregion 172) (Olson et al. 2000).

Citation: Bedjanič, M. 2009. Microgomphus wijaya. The IUCN Red List of Threatened Species 2009: e.T60282A12322278. . Downloaded on 21 May 2018.
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