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Genus Overview
No genus-level description defined.
Characteristics
POLLUTION TOLERANCE
Southeast: 6.2
Upper Midwest: 1
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Engulfer / Predator
MOVEMENT
Burrower
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Lotic-erosional
Diagnostic Characters
+ Expanded Character List
Order: Nymph with mask-like labium below chewing mouthparts. Wings developing in wing pads. Segmented legs present, each with two claws. 
Family: Suborder Anisoptera (i.e., Dragonflies: stout body shape, head more narrow than thorax and abdomen, end of abdomen with 5 short pointed projections, external gills absent). Labial mask flattened, without hair on palm of inside of mask (premental setae) or usually without setae along margins of palpal lobes at end of mask. Ligula (distal margin of labial mask) without median cleft. Antennae each 4-segmented, although 4th segment usually small. Fore- and middle tarsi each 2 segmented. Mature larvae 23–40 mm long, rarely to 65 mm.
Genus: Not defined.