Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Odonata Chlorogomphidae

Scientific Name: Chlorogomphus iriomotensis
Species Authority: Ishida, 1972
Chlorogomphus iriomotensis
Taxonomic Notes: This species is closely related to the Taiwanese species Chlorogomphus risi.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2009
Date Assessed: 2007-03-01
Assessor(s): Karube, H.
Reviewer(s): Clausnitzer, V. & Kalkman, V. (Odonata Red List Authority)
Endemic to Japan and restricted to the Iriomotejima islands of the Ryukyu archipelago. This island covers an area of 284 km² and C. iriomotensis probably occurs in less than 100 km². However, the species has strong populations and the larger part of Iriomotejima islands is designated as a nature reserve. The only known potential threat to the species comes from the possible effects of climate change. At present, although its range is restricted, the species is not considered to be under high risk of extinction and is therefore assessed as Least Concern.
Previously published Red List assessments:
1996 Endangered (EN)
1994 Rare (R)

Geographic Range [top]

Range Description: Endemic for Japan and restricted to the Iriomotejima islands of the Ryukyu archipelago. This island is 284 km² large.
Countries occurrence:
Estimated area of occupancy (AOO) - km2: 1-99
Number of Locations: 10
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The species has a restricted range and the population is stable.
Current Population Trend: Stable
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: The species inhabits the upper mountain streams in virgin subtropical forest. Adults fly in swarms through gaps in the forest.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Most habitats have not changed, but potentially recent drought (perhaps global warming) has impacted the stream species. It is also affected by pollution from farming and domestic developments.

Conservation Actions [top]

Conservation Actions: Research into the life history of this species is required, as is its current status regarding population size and trend.

Citation: Karube, H. 2009. Chlorogomphus iriomotensis. The IUCN Red List of Threatened Species 2009: e.T4726A11090278. . Downloaded on 04 October 2015.
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