“Primitive Minnow Mayflies”
Genus Overview
19 species in North America. Not commonly collected. Can be confused with other families of mayflies like Baetidae and Ameletidae. The genus is noted by the double lamellae of the gills. Typically found in slower to almost no current depositional habitats of streams and rivers.
Characteristics
POLLUTION TOLERANCE
Southeast: 2.6 and higher
Upper Midwest: 7 and higher
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Collector / Gatherer
MOVEMENT
Climber
Swimmer
Swimmer
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lentic-littoral
Lotic-depositional
Lotic-depositional
Diagnostic Characters
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