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Family Overview
The stout larva is without conspicuous terminal gills; the palpal lobes (apical projections at the end of the large, retractile labial prementum—“lower lip”) are triangular, much broader apically than basally and with large, irregular teeth.
Characteristics
POLLUTION TOLERANCE
Mid-Atlantic: up to 3
Upper Midwest: up to 3
Southeast: up to 6.1
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Engulfer / Predator
MOVEMENT
Burrower
Media
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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: The stout larva is without conspicuous terminal gills; the palpal lobes (apical projections at the end of the large, retractile labial prementum—“lower lip”) are triangular, much broader apically than basally and with large, irregular teeth.