order
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Coleoptera
“Adult Beetles”
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Coleoptera
“Larval Beetles”
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Diptera
“True Flies”
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Ephemeroptera
“Mayflies”
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Hemiptera
“True Bugs”
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Lepidoptera
“Aquatic Caterpillars, Snout Moths”
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Megaloptera
“Alderflies, Dobsonflies, and Fishflies”
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Odonata
“Dragonflies and Damselflies”
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Plecoptera
“Stoneflies”
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Trichoptera
“Caddisflies”
family
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
Shredder / Herbivore
MOVEMENT
Burrower
Clinger
Clinger
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Lotic-erosional
Lotic-erosional
Diagnostic Characters
Order
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Eye Spots
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Lateral Gills USUALLY Absent
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USUALLY 4-5-Segmented Legs
Family
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3 or Less Antennal Segments
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4-Segmented Legs
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9-Segmented Abdomen
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Distinct Labrum
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Operculum lacking
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Posterior Gill Tufts
+ Expanded Character List
Order:
Larvae: Usually without lateral abdominal gills. If gills present, then 4 hooks clustered on segment 10. Thoracic legs each usually with 4 or 5 segments and with 1 or 2 claws; if without legs, head distinctly sclerotized and posterior body (thorax and abdomen) simple, without gills, hair brushes, suckers, or breathing tube. Eye spots usually present, but compound eyes absent.
Family:
Thoracic legs are present with each having four segments and a claw; the labrum is distinct; the abdomen has 9 segments and distinct tufts of gills in the anal region but without a lid-like operculum.
Genus:
Operculate covering on 9th segment absent, ninth abdominal segment with numerous finger like anal gills,
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Lateral
Ventral