Ephemeroptera: Ephemerellidae of Gunnison County, ColoradoAttenella margarita (Needham) 1927Little Western Blue-Winged OliveUpdated 1 Dec 2006
Locations CollectedGunnison River, Tomichi Creek, Cebolla CreekLinksPhotos - from Troutnut.com http://www.troutnut.com/specimen/623Map - 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/166.htm ReferencesArgyle,DW; Edmunds,GF 1962 Mayflies (Ephemeroptera) of the Curecanti Reservoir Basins Gunnison River, Colorado. University of Utah Anthropological Papers 59 8, 178-189.Discussed as Ephemerella margarita. Quote from page 188: " The nymphs of this species were very young and many of them were probably not detected in hand screen collections. " They collected their nymphs on July 7th and 8th, 1961. McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274. Quote from page 264: "This species has a somewhat unusual distribution pattern in North America. It is known from populations in the extreme northeastern United States and eastern Canada as well as western populations from British Columbia to New Mexico. It is most common in the western slope/plateaus region of Colorado." McCafferty,WP; Wang,T-Q 1994 Phylogenetics and the classification of the Timpanoga complex (Ephemeroptera: Ephemerellidae). Journal of the North American Benthological Society 13 4, 569-579. McCafferty,WP; Wang,T-Q 2000 Phylogenetic systematics of the major lineages of Pannote mayflies (Ephemeroptera: Pannota). Transactions of American Entomological Society 126 1, 9-101. NAWQA National Water-Quality Assessment database said this species was found in their samples from Gunnison County. Searched 1Sept2005. Needham JG. 1927. The Rocky Mountain species of the mayfly genus Ephemerella. Annals of the Entomological Society of America 20:107-117. Described the nymph as Ephemerella margarita. 
Ward,JV; Stanford,JA 1990 Ephemeroptera of the Gunnison River, Colorado, USA. In: Mayflies and Stoneflies. Ed: Campbell,IC Kluwer Academic Publishers, 215-220. The United States Geological Survey (USGS) National Water Quality Assessment Data Warehouse (NAWQA) shows this species is present in Gunnison County. Data as of 1Sep2005 |