“Seine-net Weaver Caddisflies”
Genus Overview
This common and widespread genus includes more than 40 species in North America. Like other members of the Hydropsychidae, they build fixed retreats with attached nets for filter feeding. Food includes algae, detritus, and some small invertebrate animals. They prefer streams with lots of riffles, especially warmer streams and rivers. Physically, they are similar in appearance to other hydropsychids, but can be distinguished because their frontoclypeus is usually notched; if it isn’t, the pair of intersegmental sclerites behind the prosternum are small, or both of these characters are usually present.
Characteristics
POLLUTION TOLERANCE
Southeast: 6.6
Upper Midwest: 5
Midwest: 2.9
Mid-Atlantic: 5
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Collector / Filterer
Engulfer / Predator
Engulfer / Predator
MOVEMENT
Clinger
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-erosional
Diagnostic Characters
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