Stylogomphus albistylus
(Hagen in Selys, 1878)
Eastern Least Clubtail
Stylogomphus albistylus, the eastern least clubtail, is a small clubtail in the Gomphidae. It is found in eastern North America, particularly in the Appalachian region and surrounding areas. The is classified as Least Concern by the IUCN, with a stable and no immediate threats to its survival.
Pronunciation
How to pronounce Stylogomphus albistylus: //ˌstaɪloʊˈɡɒmfəs ˌælbaɪˈstaɪləs//
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Identification
As a member of the Stylogomphus, this is among the smallest clubtails. The specific epithet 'albistylus' refers to white markings on the (appendages at the tip). Positive identification requires examination of male terminal appendages and comparison with the only other North American species in the genus, Stylogomphus sigmastylus (least clubtail), which has a more western and northern distribution.
Images
Habitat
Associated with small to medium streams and rivers, typically in forested or partially wooded settings. Favors clear, flowing water with rocky or gravelly substrates.
Distribution
Eastern North America, primarily in the Appalachian Mountains and eastward. Documented from Ohio, Michigan, Wisconsin, and Vermont in the United States. Range extends into adjacent Canadian provinces.
Human Relevance
Not of direct economic importance. Occasionally encountered by anglers, hikers, and naturalists in riparian . Serves as a potential indicator of healthy stream due to specific habitat requirements.
Similar Taxa
- Stylogomphus sigmastylusThe only other North American Stylogomphus ; distinguished by male shape and geographic distribution (more western and northern)
- Small Gomphus speciesSimilar size and general appearance; requires examination of appendage structure for reliable separation
More Details
Conservation Status
IUCN Red List category: Least Concern (). trend assessed as stable.
Etymology
The specific epithet 'albistylus' combines Latin 'albi-' (white) and Greek '-stylus' (pillar/appendage), referring to the pale coloration of the male .