Onychogomphus assimilis


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Onychogomphus assimilis
Species Authority: (Schneider, 1845)
Common Name(s):
English Dark Pincertail
Onychogomphus fulvipepennis Bartenef, 1912

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2ac+3c ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor(s): Boudot, J.-P.
Reviewer(s): Clausnitzer, V. & Suhling, F. (Odonata Red List Authority)
This species inhabit an area of about 681,000 km² from Turkey to Turkmenistan. Some populations were flourishing in the past but a significant number of these localities either are currently destroyed from year to year through urbanization, gravel pitting directly in streams, stream dragging and water harnessing. The rapid ongoing tourist development and demographic expansion of the Turkish south coast, from where were known the best populations, led to the loss of many localities so that in this area the species will be threatened of extinction within the next decade. An overall reduction of 30% is likely within the next 10 years.
1996 Vulnerable (Baillie and Groombridge 1996)
1996 Vulnerable
1994 Rare (Groombridge 1994)
1990 Rare (IUCN 1990)
1988 Rare (IUCN Conservation Monitoring Centre 1988)

Geographic Range [top]

Range Description: From southwest Turkey to western Turkmenistan.
Armenia (Armenia); Georgia; Iran, Islamic Republic of; Turkey; Turkmenistan
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species has been reported from 26 different streams, either in single specimens or under flourishing populations (> 1,000 exuviae).
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Streams.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Water pollution, gravel pitting in stream major beds, stream drying due to water harnessing and irrigation, and urbanization.

Conservation Actions [top]

Conservation Actions: Control of pollution, gravel pitting, water harnessing and irrigation are needed.

Citation: Boudot, J.-P. 2006. Onychogomphus assimilis. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 26 March 2015.
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