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Ephemeroptera: Ameletidae of Gunnison County, Colorado

Ameletus subnotatus

Eaton, 1885
Updated 28 December 2025
TSN 101014

Good Links

On this website:
Ameletus Introduction

Other Websites:
Photos, Map, Taxon Identifier Numbers - from the Global Biodiversity Information Facility Ameletus subnotatus at Gbif

Photos, Map, Museum specimens, DNA - Barcodinglife.org

North American distribution map - flyfishingentomology.com

References

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.

McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 (3) 252-274. PDF
     Quote from page 254: "Dodds (1923) simply stated that a few specimens of A. subnotatus were found in South Boulder Valley. There is some question as to whether those specimens or the concept of Traver (1935) are applicable to this species. The species has not been reported in ecological studies and has not been clearly defined. According to J. Zloty (pers. comm.), who is presently revising the genus Ameletus in western North America, A. subnotatus is a northern boreal, transcontinental species. See also Remarks under A. aequiuocus, above."

Zuellig,RE; Heinold,BD; Kondratieff,BC and Ruiter,DE 2012 Diversity and Distribution of Mayflies (Ephemeroptera), Stoneflies (Plecoptera), and Caddisflies (Trichoptera) of the South Platte River Basin, Colorado, Nebraska, and Wyoming, 1873-2010.U.S. Geological Survey Data Series 606, 257 p. PDF - caution 46MB
     Elevation collected 7,600-4,950 ft. Adults were found in April. Quote from page 16: "Remarks: Larval exuviae of this Ameletus species often are found in abundance clinging to exposed surfaces along the edges of the middle and low reaches of the Cache la Poudre River in early spring. Dodds (1923) reports "a few specimens have been found in South Boulder Valley [Colorado], exact locality unknown. Zloty (1996) did not include these Boulder County records in his revision of Nearctic Ameletus so the status of A. subnotatus in Boulder County is not verified. This species is probably more widespread in the SPRB than records indicate."

Brown,WS 2024 Mayflies (Ephemeroptera) of Gunnison County, Colorado, USA
www.gunnisoninsects.org