“Riffle Beetles”
Genus Overview
This is a widespread genus with 13(15) North American species (including formally Promoresia). Larvae and adults live in fast and slow portions of streams, clinging to substrate. Adults are collectors-gatherers of fine organic particles.
Characteristics
POLLUTION TOLERANCE
Southeast: 2.7 and higher
Upper Midwest: 4 and higher
Midwest: 2.75 and higher
Mid-Atlantic: 4 and higher
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Collector / Gatherer
MOVEMENT
Clinger
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Lotic-erosional
Lotic-erosional
Diagnostic Characters
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