Sieboldius alexanderi 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Odonata Gomphidae

Scientific Name: Sieboldius alexanderi (Chao, 1955)
Common Name(s):
English Small Dragonhunter
Taxonomic Notes: Originally described by Chao (1955) under the genus Hagenius Sélys, and subgenus Sieboldius Sélys, the former of which is now considered to contain just one species, namely Hagenius brevistylus Sélys, from North America (Davies and Tobin 1985). Carle (1986) established the subgenera Hagenoides with Sieboldius alexanderi as the type species. Chao (1990) sank Carle's Hagenoides subgenus with the nominate subgenus established by Chao in 1984. Bridges (1994) considered Carle's subgenus Hagenoides valid but probably overlooked Chao (1984).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2009
Date Assessed: 2007-03-15
Assessor(s): Wilson, K. D. P.
Reviewer(s): Clausnitzer, V. & Reels, G. (Odonata Red List Authority)
Limited number of records (four) from Fujian the type-locality, Dinghushan, Guangdong (Wilson 1999) and Hong Kong (Wilson 2004) and Nanling (Fellowes et al. 2003).

Geographic Range [top]

Range Description:Known from just four locations: (i) the type-locality in Fujian (Chao 1990), (ii) Hong Kong (Wilson 2004), (iii) Dinghushan, Guangdong (Wilson 1999), and (iv) Nanling, north Guangdong (Fellowes et al. 2003).
Countries occurrence:
China (Fujian, Guangdong); Hong Kong
Additional data:
Number of Locations:4
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No information is known on the population size or trend.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:Prefers forested hills streams.

Threats [top]

Major Threat(s): Infrastructural development is affecting the habitat of Sieboldius alexanderi; clear-cutting of forests for the building of dams and powerlines are an ongoing problem.

Conservation Actions [top]

Conservation Actions: There are no conservation measures currently known.

Citation: Wilson, K. D. P. 2009. Sieboldius alexanderi. The IUCN Red List of Threatened Species 2009: e.T167131A6306180. . Downloaded on 18 June 2018.
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