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

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

» Genus Acerpenna (Tiny Blue-Winged Olives)

Species in Acerpenna
Acerpenna pygmaeaTiny Blue-Winged Olive	0	0

4 species aren't included.

Common Name

Match	Common Name
	Tiny Blue-Winged Olives

Pictures Below ↓

See Acerpenna pygmaea for details. It is the only species known to be of even minor importance to anglers and was previously known as Baetis pygmaeus.

Pictures of 4 Mayfly Specimens in the Genus Acerpenna:

Specimen Page:12

Acerpenna pygmaea (Tiny 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

Male Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Spinner

View 8 Pictures

Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020

Female Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Spinner

View 6 Pictures

Collected July 31, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 17, 2020

Specimen Page:12

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