Ephemeroptera: Heptageniidae of Gunnison County, ColoradoRhithrogena flavianula (McDunnough) 1924Updated 23 May 2005
LinksOn this website:Introduction to Rhithrogena Other Websites: 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/308.htm ReferencesMcCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274.Quote from page 262: "McDunnough (1924)as Heptagenia flavianula Gunnison Co. (Gunnison), Garfield Co. (Glenwood Springs). The above records are the only ones presently available for this species. The fact that the larval stage remains unknown may be the reason for it not being reported again since its original description. The third author has studied the types of R. flavianula and determined it is distinct from R. hageni Eaton. There are unidentifiable larvae at CSU from the North Platte River that lack dorsal protuberances on the gills, similar to R. robusta, but also lack a sclerotized setal line on the gills ventrally. These may eventually prove to be the larvae of R. flavianula. " McDunnough J. 1924. New North American Ephemeridae. Canadian Entomologist 56:221-226. Described as Heptagenia flavianula. 
Brown, Wendy S. 2004 Mayflies (Ephemeroptera) of Gunnison County, Colorado, USA www.gunnisoninsects.org |