Eastern Salmonfly vs Silvestri's Acerentomid

Side-by-side species comparison

Attribute Eastern Salmonfly Silvestri's Acerentomid
Scientific Name Pteronarcys biloba Acerentomon affine
Order Plecoptera Protura
Family Pteronarcyidae Acerentomidae
Size 30-40 mm 0.7-1.2 mm
Habitat Rivers & Streams Forests
Diet Detritivores Detritivores
Regions North America Europe
Conservation Least Concern Not Evaluated

Eastern Salmonfly

A large dark stonefly of Appalachian streams that emerges in late spring. Nymphs process leaf litter and are important detritivores.

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Did You Know?

Nymphs retain functional gills throughout development, unlike many stoneflies that lose them with age.

Silvestri's Acerentomid

A minute proturan found across central European forest soils. It is among the earliest described proturan species.

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Did You Know?

Proturans undergo a unique developmental process called anamorphosis where body segments are added after hatching.