Ephemeroptera: Heptageniidae of Gunnison County, ColoradoEpeorus grandis(McDunnough) 1924Updated 25 Jan 2012
TSN 100635 DescriptionMayflies of the US says E. grandis is present in the county. Watch for a dark or blackish Epeorus larvae with gills that are purple underneath and a row of setae on their abdominal terga (top or ventral side of their abdomen). See the photos from Troutnut.com below.Good LinksOn this website:Introduction to Epeorus Other Websites: Photos - from Troutnut.com 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/268.htm ReferencesEdmunds,GF; Allen,RK 1964 The Rocky Mountain species of Epeorus (Iron) Eaton (Ephemeroptera: Heptageniidae). Journal of the Kansas Entomological Society 37 4, 275-288. PDFGilpin,BR and Brusven,MA 1970 Food habits and ecology of mayflies of the St. Maries River in Idaho. Melanderia 4:19-40. PDF McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274. PDF Discussed as Ironopsis grandis Quote from page 261: "The first author has seen specimens from Idaho, Washington, and Wyoming. This species was therefore to be expected in Colorado. It is suprising that the disctinctive larvae of this species had not been reported before in any of the state ecological studies, and it may be that populations are very isolated, such as those of the Black Hills, South Dakota (McCafferty, 1990). " McDunnough,J 1924 New Canadian Ephemeridae with notes, II. Canadian Entomologist 56, 90-98, 113-122, 128-133. Described as Iron grandis on page 130. Figure 1 is from page 91.   |