Ephemeroptera: Heptageniidae of Gunnison County, ColoradoHeptagenia elegantula
Dark Quill Gordon, Western yellow drake, Grey drake (Eaton) 1885
Updated 1 Jan 2012
TSN 100604
Good Links
On this website:
Heptagenia solitaria
Other Websites:
Photos, Map, Museum specimens, DNA - Barcodinglife.org
Map - Kondratieff, Boris C. (coordinator). 2000. Mayflies of the United States. Jamestown, ND: Northern Prairie Wildlife Research Center Online. (Version 12DEC2003). http://www.npwrc.usgs.gov/resource/distr/insects/mfly/usa/278.htm
References
Bedarik,AF and Edmunds,GF 1980 Descriptions of larval Heptagenia from the Rocky Mountain region (Ephemeroptera: Heptageniidae). Pan-Pacific Entomologist (56) 51-62. PDF
Eaton AE. 1883-1888. A revisional monograph of recent Ephemeridae or mayflies. Transactions of the Linnean Society of London, Second Series, Zoology 3:1-352, 65 pl.
Described as Rhithrogena elegantula.
Edmunds Jr, GF. 1995 Habitat differences between northern and southern populations of mayflies of the western United States. Pages 171-176 in Corkum LD; Ciborowski JJH. Current Directions in Research on Ephemeroptera. Canadian Scholars' Press, Inc. Toronto.
Gilpin,BR and Brusven,MA 1970 Food habits and ecology of mayflies of the St. Maries River in Idaho. Melanderia 4:19-40. PDF
Haden,GA; Blinn,DW; Shannon,JP; Wilson,JP 1999 Driftwood: an alternative habitat for macroinvertebrates in a large desert river. Hydrobiologia 397, 179-186.
McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274. PDF
Quote from page "Larvae of H. elegantula can be dificult to distinguish from H. solitaria. See Bednarik and Edmunds (1980) for dorsal abdominal pattern variations in both species. Larvae tentatively identified as H. elegantula in CSU are from Grizzly Creek (Jackson Co.)"
They report specimens in the Purdue University Entomological Collection (PERC) from Iola in Gunnison County. Unfortunately now the ex-Gunnison River at the ex-town of Iola is usually under the water of Blue Mesa Reservoir.
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