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Prosternal horn, short antenna midway, gills>4, Femora 2 major setae surface of head smooth. Case fine gravel and fragmented Tsuga mertensia needles. Habitat: Small alpine pond informing high gradient (45 to 90 defree) stream) May explain Merritt and Cummins assessment which came with a question mark

Collected from a perennial cold-water stream in riffle habitat.

Special thanks to the NAU Arthropod Imaging Lab for allowing us to use their equipment.

Photographed by Grace Olsen
Collected by Kalai Kollus

LargeMayfly_LCR_HAD_1

A mayfly resting on my electric fan frame in my room. Mayflies usually rest in this typical resting pose where the body seems bend up while the frontlegs have a right angle bend. Has a concave head and 2 cerci that are longer than the body length. 8mm per wing length.