endemic to a single nation
Regularity: Regularly occurring
Type of Residency: Year-round
Global Range: (250-20,000 square km (about 100-8000 square miles)) Known from the piedmont area of Georgia, North Carolina, South Carolina and Tennessee.
Length: 4 cm
Abdominal segment 9 is longer than 8 but shorter than 7. Genitalia. (Westfall, 1965; Carle & May, 1987).
Habitat and Ecology
Comments: Boggy trickles, slow small streams, and lakes, these with sandy silt bottoms and sphagnum moss edges. Adults forage in open forest near ground level.
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Probably does not stray far from larval habitats.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 6 - 20
Comments: Known from 11 locations in four states. Most of the range of this species is in the Carolinas. In South Carolina it is found only in two counties distant from each other and there are no records in Tennessee (Bick, 2003). It is known from three locations in Richmond County, Georgia (Beaton, 2007b).
10,000 - 100,000 individuals
Comments: Maybe 1000 or more at each location.
Larvae require acid, slowly moving water.
Life History and Behavior
Comments: Larvae overwinter, adult flight season early April to late May.
IUCN Red List Assessment
Red List Category
Red List Criteria
- 1994Rare(Groombridge 1994)
- 1990Rare(IUCN 1990)
- 1988Rare(IUCN Conservation Monitoring Centre 1988)
- 1986Rare(IUCN Conservation Monitoring Centre 1986)
National NatureServe Conservation Status
Rounded National Status Rank: N3 - Vulnerable
NatureServe Conservation Status
Rounded Global Status Rank: G3 - Vulnerable
Reasons: This species has a small range with specific habitat requirements. No specific threats are known.
Other Considerations: Adults inconspicuous, must be carefully sampled.
Global Short Term Trend: Relatively stable (=10% change)
Comments: Usual general threats, no specific threats known.
Degree of Threat: Unknown
Comments: No current specific threats are known, but potential threats include development and forestry (Abbott, 2007).
Biological Research Needs: Describe larvae
Global Protection: Few (1-3) occurrences appropriately protected and managed
Comments: Occurs in Cheraw State Park, Campbell Lake State Park, and the Savanna River Plant in South Carolina.
- Odonata Specialist Group 1996. Gomphus diminutus. 2006 IUCN Red List of Threatened Species. Downloaded on 9 August 2007.
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Names and Taxonomy
Comments: G. westfalli may be a subspecies. Classified in the subgenus Phanogomphus (Carle 1986).