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Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Nymph Pictures

 This is a very rare mayfly in western Montana. The shape of the last gill is a key to its identification. I have collected this species in only one location.

This mayfly was collected from the Upper Stillwater River on May 5th, 2007 and added to Troutnut.com on June 26th, 2011.

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Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Nymph from the Upper Stillwater River in Montana
AuthorBnewell
View Full SizeView Full Size (2X larger)
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Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Nymph from the Upper Stillwater River in Montana
AuthorBnewell
View Full SizeView Full Size (2X larger)
AddEmail
Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Nymph from the Upper Stillwater River in Montana
AuthorBnewell

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