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Ephemeroptera: Leptophlebiidae of Gunnison County, Colorado

Introduction to the Mayfly genus Choroterpes

Eaton, 1881
Updated 26 Jan 2016
TSN 101108
Choroterpes gill

Locations Collected

Larvae are present in Tomichi Creek east of Gunnison.


On this website:
Leptophlebiidae Introduction
Choroterpes inornata may be present in the upper Gunnison Basin.
Choroterpes albiannulata may also be present.

Other Websites:


Allen RK. 1974 Neochoroterpes, a new subgenus of Choroterpes Eaton from North America (Ephemeroptera: Leptophlebiidae). Canadian Entomologist 106:161-168.

Eaton,AE 1881 An announcement of new genera of the Ephemeridae. Entomologist's Monthly Magazine 17:191-197.
     The Reverend Alfred Edwin Eaton describes the mayfly genus Choroterpes in this paper. Now the "foliaceous abdominal tracheal branchiæ" are called "gills" :-)

Edmunds,GF and Musser,GG 1960 The mayfly fauna of the Green River in the Flaming Gorge Reservoir Basin, Wyoming and Utah.University of Utah Anthropological Papers. 48:111-123.

Gerhardt A; Bisthoven LJ de; Soares AMVM. 2005. Effects of acid mine drainage and acidity on the activity of Choroterpes picteti (Ephemeroptera: Leptophlebiidae). Archives of Environmental Contamination and Toxicology 48:450-458.

Kluge,NJ 2012 Contribution to the knowledge of Choroterpes (Ephemeroptera, Leptophlebiidae). Russian Entomological Journal, 21(3), pp.273-306. PDF

McCafferty, WP 1992 New larval desciptions and comparisons of North American Choroterpes (Ephemeroptera: Leptophlebiidae) Great Lakes Entomologist (25)71-78.

McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274. PDF
     Quotes from page 262:
Choroterpes albiannulata "In an unpublished Master's Thesis submitted to Colorado State University in 1977, E.L. Ames had earlier reported this species in abundance in the Yampa River (Moffat County and Routt County) and White River (Rio Blanco County). Edmunds and Musser (1960) reported this species from the Green River in nearby areas of both Utah and Wyoming. It is now generally known from throughout the Northwest, and McCafferty (1992) has recently described the larval stage, allowing the present confirmation."Choroterpes inornata" Colorado is evidently the northernmost location of this species, which was originally described from Mexico (Eaton, 1892). Allen (1974) showed C. inornata as occurring in southern Colorado on a range map, but provided no specific information. Larvae reported from La Plata County by Peters and Edmunds (1961) are probably attributable to this species."

Peters WL, Edmunds Jr GF. 1961 The mayflies (Ephemeroptera) of the Navajo Reservoir Basin, New Mexico and Colorado. University of Utah Anthropological Papers, No. 55, Upper Colorado Series, No. 5, pp.

Peters,WL 1988 Origins of the North American Ephemeroptera fauna, especially the Leptophlebiidae. Memoirs of the Entomological Society of Canada, (144) 13-24.


First gill of Choroterpes sp. larvae.

Brown,WS 2006 Ephemeroptera of Gunnison County, Colorado