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order
Coleoptera
“Adult Beetles”
Coleoptera
“Larval Beetles”
Diptera
“True Flies”
Ephemeroptera
“Mayflies”
Hemiptera
“True Bugs”
Lepidoptera
“Aquatic Caterpillars, Snout Moths”
Megaloptera
“Alderflies, Dobsonflies, and Fishflies”
Odonata
“Dragonflies and Damselflies”
Plecoptera
“Stoneflies”
Trichoptera
“Caddisflies”
Coleoptera
family
Dytiscidae
“Predacious Diving Beetle Larvae”
Elmidae
“Riffle Beetle Larvae”
Gyrinidae
“Whirligig Beetle Larvae”
Haliplidae
“Crawling Water Beetle Larvae”
Hydrophilidae
“Water Scavenger Beetle Larvae”
Psephenidae
“Water Pennies”
Ptilodactylidae
“Toe-Winged Beetle Larvae”
Ptilodactylidae
genus
Anchytarsus
“Toe-Winged Beetle Larvae”
Genus Overview
One species, Anchytarsus bicolor, in North America.  Found in small, cool, streams. Not much is known about the biology and ecology.  Life cycle might be 3 years. 
Characteristics
POLLUTION TOLERANCE
Southeast: 3.8 and higher
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Shredder / Detritivore
Shredder / Herbivore
MOVEMENT
Burrower
Clinger
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Lotic-erosional
Diagnostic Characters
order
Eye Spots
Lateral Gills USUALLY Absent
USUALLY 4-5-Segmented Legs
family
3 or Less Antennal Segments
4-Segmented Legs
9-Segmented Abdomen
Distinct Labrum
Operculum lacking
Posterior Gill Tufts
+ Expanded Character List
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No iNaturalist images found.
Lateral
Ventral