Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes


TaxonomyBrowse
Info
ImagesLinksBooksData

Family Perlidae - Common Stoneflies

Large Stonefly - Hesperoperla pacifica Isoperla similis - Perlesta shed skin, Paragnetina sp, likely immarginata - Paragnetina immarginata Perlid stonefly, genus Agnetina - Claassenia sabulosa Acroneuria carolinensis stonefly - Acroneuria abnormis - female Acroneuria carolinensis Stonefly - Perlesta
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Plecoptera (Stoneflies)
Superfamily Perloidea
Family Perlidae (Common Stoneflies)
Other Common Names
Golden Stoneflies, Golden Stones
Numbers
world's largest stonefly family (fifth largest in our area): 2 subfamilies with 84 spp. in 15 genera in our area(1) [74 in the lower 48 states(2)] and almost 1000 spp. in 52 genera worldwide(3)
Size
adult length 9-40 mm
Identification
Adult: variably yellowish to brownish (but not green); anal area of forewing lacks rows of cross veins; ventral surface of thorax with remnants of branched nymphal gills, usually immediately behind bases of legs
Nymph: yellowish to brown with prominent dark pattern on dorsal surface of head and thorax; thoracic segments wider than long, and legs thick, giving a stout-bodied robust appearance; ventral thoracic gills profusely branched; paraglossae extend beyond glossae
"A close-up view of the tip of the abdomen is often the best way to determine genus (and perhaps species). A dorsal view of the terminalia is probably best for males, and a ventral view of the last few abdominal segments is best for females." --Lloyd Gonzales
Range
worldwide (except Australia & parts of Africa); throughout NA(3)
Habitat
nymphs often under large stones in streams and rivers
Season
adults emerge in spring and present April to September
Food
nymphs prey mainly on small aquatic invertebrates; may eat detritus and algae; adults do not feed
See Also
Adult Pteronarcyidae have two or more cross veins in anal area of forewing, and nymphs have gills on first two abdominal segments as well as thoracic gills. Nymphs of Chloroperlidae and Perlodidae have thoracic gills (single or double) not profusely branched.