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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”
Plecoptera
family
Capniidae
“Small Winter Stoneflies”
Chloroperlidae
“Green Stoneflies”
Leuctridae
“Rolled-winged Stoneflies”
Nemouridae
“Spring Stoneflies, Forestflies”
Peltoperlidae
“Roach-like Stoneflies”
Perlidae
“Common Stoneflies”
Perlodidae
“Stripetails, Springflies, Yellow Stones”
Pteronarcyidae
“Giant Stoneflies”
Taeniopterygidae
“Broadbacks, Winter Stoneflies”
Pteronarcyidae
genus
Pteronarcys
“Giant Stoneflies”
Genus Overview
8 species in North America. Occur in various stream types.  Very large stonefly that looks archaic and prehistoric.  Common name is salmonfly. 
Characteristics
POLLUTION TOLERANCE
Southeast: 1.7
Midwest: 2.2
0 = least tolerant, 10 = most tolerant
FEEDING HABITS
Engulfer / Predator
Scraper / Grazer
Shredder / Detritivore
Shredder / Herbivore
MOVEMENT
Clinger
Sprawler
DISTRIBUTION
Widespread (east of the Rocky Mtns.)
HABITAT
Lotic-depositional
Lotic-erosional
Diagnostic Characters
order
Two Tails
Two Tarsal Claws
family
Gill Tufts on Thorax and Abdomen
Paraglossae And Glossae Subequal
+ Expanded Character List
Media
Pteronarcys
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Dorsal
Ventral