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Cyclogomphus gynostylus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA INSECTA ODONATA GOMPHIDAE

Scientific Name: Cyclogomphus gynostylus
Species Authority: Fraser, 1926
Taxonomic Notes: Taxonomically isolated, no near allies.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor(s): Bedjanič, M.
Reviewer(s): Clausnitzer, V. & Suhling, F. (Odonata Red List Authority)
Justification:
A rare 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.

Some individuals are present in large odonatological collections made by NHM Basle (Switzerland) and NMNH - Smithsonian Institution (USA). Also found during the assessor’s surveys in recent years (2001, 2003). Additional exhaustive faunistic surveys by odonatologists and covering appropriate localities in different seasons are urgently needed.

Geographic Range [top]

Range Description: Sri Lanka. Recently known from only few localities in central and southwestern part of the island.
Countries:
Native:
Sri Lanka
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Unknown, small and fragmented. A rare species.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The species inhabits rivers in lowlands and mid-hills, occasionaly also artificial lakes and irrigation channels.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Primary habitat is under threat, but apparently the species inhabits broader spectrum of habitats.

Pollution and other pressures on streams and rivers in the southwestern and central part of Sri Lanka are the major threat for exceptionaly rich endemic dragonfly fauna of the island (Bedjanič 2004).

Conservation Actions [top]

Conservation Actions: Apart of 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; (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 (Bedjanič 2004).

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 urgently be focused on still preserved and protected areas. Research on biology and ecology of selected endangered species should also be carried out.

Regarding species habitat and potential area of occurrence, the South-western Sri Lanka Rivers and Streams (Ecoregion 172) are included in WWF’s global 200 list of the earth’s most biologically outstanding habitats. The conservation status of the ecoregion is judged as vulnerable (Olson et al. 2000).

Citation: Bedjanič, M. 2006. Cyclogomphus gynostylus. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 01 October 2014.
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