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WA Mayfly Description


Taxonomic Name
(Common Name)
Larva (Nymph)Subimago (Dun)
Imago (Spinner)
Heptageniidae
(Flatheaded Mayfly)
Flattened body; flattened horizontally oriented head; eyes & antennae visible from above; sprawling legs; gills on ab segs 1-7, most with tufts at base; 2 or 3 tails. 2 tails and large hind wings; 2 pairs of cubital intercalary veins present in FWs; 2 tails.


Taxonomic Name
(Common Name)
Larva (Nymph)Subimago (Dun)
Imago (Spinner)
Cinygmula
(Blue-winged Red Quill; Red Quill. )
mature larva (nymph)

Copyright © 2011 Jason Neuswanger

subimago (dun) - male

Copyright © 2011 Jason Neuswanger

imago (spinner) - male

Copyright © 2012 Bob Newell

CinygmulaFront margin of head w/distinct notch in midline; maxillary palps are often visible from above sticking out from head; gills of abdominal segments 1-7 all similar, plate-like w/o fibrils; femora unbanded. First segment of fore tarsi half length of second.
Cinygmula gartrelli  
Cinygmula mimus  
Cinygmula par  
Cinygmula ramaleyi  
Cinygmula reticulata  
Cinygmula tarda  
Cinygmula uniformis  

State of Washington distribution is based on:
Mayflies (Ephemeroptera) of the far western United States (Part I: Washington) by M. D. Meyer & W. P. McCafferty,
and augmented by A DNA Barcode Library for North American Ephemeroptera: etc. by Webb, Jacobus, Funk, et. al.  

Created: 08/16/2013   Last modified: 12/07/2014    www.FlyfishingEntomology.com