|Scientific Name:||Paragomphus henryi (Laidlaw, 1928)|
Mesogomphus henryi Campinon & Laidlaw, 1928
|Taxonomic Notes:||Originally described as Mesogomphus henryi Laidlaw in Campion & Laidlaw, 1928.|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Reviewer(s):||Kalkman, V. & Clausnitzer, V. (Odonata Red List Authority)|
Currently the species is known from almost 40 localities, mostly in south-western and central part of Sri Lanka. Strong larval populations have been found by author even in some streams where no adults were observed, what might be an indication of wider distribution of the species.
However, Fraser’s statement from 70 years ago (Fraser 1933d, 1934) that Paragomphus henryi is: “The commonest Gomphine in the island, which can be found it everywhere and at all elevations…”, is not the case anymore. Therefore, despite the fact that it is still the most common representative of the family Gomphidae in Sri Lanka, it can be speculated that its population decreased markedly in last decades. Only further work and monitoring of population trends can show if the rate of decline has stabilized or is still in progress.
|Range Description:||Sri Lanka. Known from almost 40 localities, mostly in south-western and central part of the island. The species is present in all large odonatological collection, also those 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).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||At least locally, strong populations of the species exist although detailed information and trend are unknown.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Moderately to fast flowing streams and rivers in hill and mountain regions.|
|Major Threat(s):||Pollution and other pressures on streams and rivers in the south-western and central part of Sri Lanka are the major threat for exceptionally rich endemic dragonfly fauna of the island, including Paragomphus henryi.|
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).
If the above mentioned field work will be carried out, it will be possible to determine detailed distribution and population trend for Paragomphus henryi as well.
|Citation:||Bedjanič, M. 2009. Paragomphus henryi. The IUCN Red List of Threatened Species 2009: e.T163518A5610481.Downloaded on 19 November 2017.|
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