Ephemeroptera: Baetidae of Gunnison County, ColoradoBaetis flavistriga
Dark Blue-Winged Olive Dun, Dark Gray-Winged Olive Dun, Dark Olive Brown Spinner, Dark blue winged Olive #20-22, Slate Winged Brown QuillMcDunnough 1921
Updated 4 June 2009
Description
These larvae are distinctive, with dark bands on their tails and kidney shaped pale areas on the dark areas of their terga. They have three tails. The pronotum has two upside down "U-shaped" marks on a pale background.
Notes
This is one of the fuscatus group of Baetis species. Very common in eastern United States, there are scattered populations across the west as well.
Links
On this website:
Key to Baetis Nymphs
Introduction to Baetis
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/47.htm
References
Ball,SL; Hebert,PDN; Burian,SK; Webb,JM 2005 Biological identification of mayflies (Ephemeroptera) using DNA barcodes. Journal of the North American Benthological Society 24 3, 508-524.
B. flavistriga is far away from B. tricaudatus and B. bicaudatus on their phylogenetic tree, occurring on "a long basal branch as the most basal of the Baetidae".
McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274.
Quoted from page 255: "Morihara and McCafferty (1979b) stated that this species was one of the most abundant and common Baetis species in eastern North America. McCafferty (1990) concluded that the Black Hills of South Dakota represented the westernmost limits of its range, and that it´s distribution in South Dakota was relict in nature. With the confirmation of this species from at least three areas in Colorado, it is becoming clear that it is much more widespread in mountain areas. We therefore expect it to be found in other western states as materials are studied. This must be regarded as a rather special type of mayfly distribution in North America, in that it is found primarily in mountain areas across the continent (Rocky Mountains, Black Hills, Ozark-Ouachita Mountains, and the Appalachians)."
McCafferty,WP and Provonsha, AV The Mayflies of North America Species List http://www.entm.purdue.edu/entomology/research/mayfly/species.html (Version 12Jan2009)
Here is the geographic range and synonyms:
Baetis flavistriga McDunnough, 1921 [CAN:FN,NE,NW;MEX:FS,SW;USA:FN,NE,NW,SE,SW]
* Baetis caurinus Edmunds & Allen, 1957 (syn.)
* Baetis cingulatus McDunnough, 1925 (syn.)
* Baetis levitans McDunnough, 1925 (syn.)
* Baetis nanus McDunnough, 1923 (syn.)
* Baetis ochris Burks, 1953 (syn.)
* Baetis pallidula McDunnough, 1924 (syn.)
* Baetis pallidulus McDunnough, 1924 (syn.)
* Baetis phoebus McDunnough, 1923 (syn.)
* Baetis quebecensis Hubbard, 1974 (syn.)
* Baetis sinuosus Navas, 1924 (syn.)
McDunnough J. 1921 Two new Canadian May-flies (Ephemeridae). Canadian Entomologist 53:117-120.
Original description of B. flavistriga.
McDunnough J. 1923 New Canadian Ephemeridae with notes. Canadian Entomologist 55:39-50.
Discussed on pages 40 and 41:
Rowe,L; Hudson,J and Berrill,M 1988 Hatching success of mayfly eggs at low pH. Canadian Journal of Fisheries and Aquatic Sciences 45:1649-1652.
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
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