**Mayfly Genus Acerpenna (Blue-Winged Olives)**

Mayflies

Caddisflies

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Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

» Genus Acerpenna (Blue-Winged Olives)

Species in Acerpenna
Acerpenna pygmaeaBlue-Winged Olive	1	3

4 species aren't included.

Common Name

Match	Common Name
	Blue-Winged Olives

Pictures Below ↓

See Acerpenna pygmaea for details. It is the only species known to be of even minor importance to anglers.

One other species, Acerpenna mcdunnoughi, is widespread according to the USGS Mayflies of the United States page, but it has not been mentioned in angling literature.

Pictures of 1 Mayfly Specimen in the Genus Acerpenna:

Acerpenna pygmaea (Blue-Winged Olive) Mayfly Nymph

View 3 PicturesThis 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.

Collected May 5, 2007 from the Upper Stillwater River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011