Allocapnia recta

(Claassen, 1924)

Eastern Snowfly

Allocapnia , commonly known as the eastern snowfly, is a in the . The exhibits a slow-season with occurring during January-February. It inhabits karst headwater streams, where it has been observed at higher in intermittent flow sections compared to permanent flow sections. The species is found in eastern North America.

Allocapnia recta by Owen Strickland. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Allocapnia recta: /ˌæl.oʊˈkæp.ni.ə ˈrɛk.tə/

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Habitat

Karst headwater streams with both intermittent and permanent flow sections. have been documented persisting in intermittent sections even when surface flow was absent, suggesting use of hyporheic zones or groundwater refugia.

Distribution

Eastern North America. Documented from Alabama, Connecticut, Delaware, Georgia, and Illinois. The has been specifically studied in the central Kentucky karst region.

Seasonality

emerge January-February. occurs February-March. Nymphal growth primarily occurs in autumn.

Life Cycle

slow-season . lasts approximately 10 months. Nymphal stage lasts approximately 2 months. occurs February-March, with females carrying egg masses.

Behavior

maintain presence in stream sections that experience intermittent surface flow, indicating capacity to exploit subsurface refugia during dry periods.

Similar Taxa

Leuctra spp.Co-occurs in same karst stream and shares similar timing, though Allocapnia shows higher in intermittent flow sections

More Details

Flow Regime Preference

Research in central Kentucky found Allocapnia at higher in intermittent flow sections than in permanent flow sections, a pattern that contrasts with many aquatic and suggests specific to hydrologic variability.