Gomphus sandrius


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Gomphus sandrius
Species Authority: Tenessen, 1983
Common Name(s):
English Tennessee Clubtail

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii,v) ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor(s): Abbott, J.C.
Reviewer(s): Donnelly, N., Suhling, F. & Clausnitzer, V. (Odonata Red List Authority)
Tennessen (1994) stated “Cattle enter the streams...disturbing substrates, and dropping wastes. Runoff...contributes organic loading and possibly agricultural chemicals.” At one point discarded garbage and dead animals were being thrown into one of the streams where this species inhabits. The degradation to the habitat, which is restricted to one river system, is alarming. Known from six streams in a 60 square mile area within three counties. Tennessen (1994), based on anecdotal evidence, thought the population had decreased by 25-50% in ten years.
1996 Endangered
1994 Indeterminate (Groombridge 1994)
1990 Indeterminate (IUCN 1990)
1988 Indeterminate (IUCN Conservation Monitoring Centre 1988)
1986 Indeterminate (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description: Endemic to the United States: 60 square miles in south central Tennessee.
United States (Tennessee)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Current population size is unknown.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Third order streams, 10 to 60 ft wide, with a highly variable rate of flow, and with bottoms a mix of small gravel and sand; silt, mud, organic debris are minor (Tennessen 1994).
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Streams subject to pesticides, organic pollution, cattle trampling of banks.

Conservation Actions [top]

Conservation Actions: No management plans are formally operative; for their formulation, Tennessen urged cooperation with land owners, habitat restoration, and regular Odonata surveys (Bick 2003).

Citation: Abbott, J.C. 2007. Gomphus sandrius. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 28 March 2015.
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