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Female Acerpenna pygmaea (Blue-Winged Olive) Mayfly Dun Pictures

Classification
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Baetidae (Blue-Winged Olives)
» Genus Acerpenna (Blue-Winged Olives)
» Species pygmaea (Blue-Winged Olive)
Fly Imitations by Orvis
 I'm guessing this specimen is in the genus Acerpenna because of the very sharp costal process (
The costal process of a Baetidae dun.
The costal process of a Baetidae dun.
Costal process: A bump or point sticking up from the front margin of an insect's wing, usually the rear wing of certain mayflies. It is sometimes called a costal projection.
)
on her hind wing. I'm guessing pygmaea because it is the most common species.


This mayfly was collected from the Upper Midwest on July 1st, 2005 and added to Troutnut.com on April 22nd, 2006.

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Recent Discussions of this Dun

ID 4 Replies »
Posted by Taxon on Jul 2, 2006
Last reply on Sep 22, 2006 by Troutnut
Jason-

My guess would be Baetis brunneicolor.

Roger
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