Alloperla imbecilla (Say, 1823)

Myers, Luke William, Kondratieff, Boris C, Grubbs, Scott A, Pett, Lindsey A, DeWalt, R. Edward, Mihuc, Timothy B & Hart, Lily Veronica, 2025, Distributional and species richness patterns of the stoneflies (Insecta, Plecoptera) in New York State, Biodiversity Data Journal 13, pp. e 158952-e 158952 : e158952-

Alloperla imbecilla (Say, 1823)

Notes

Alloperla imbecilla is commonly known as the Ohio Sallfly ( Stark et al. 2012). This species has been reported in Canada from New Brunswick and in the USA from New York southwest to Virginia and Kentucky, primarily with an Ohio River Valley distribution ( Baumann 1974, Surdick 2004, DeWalt et al. 2024). Adults have been collected infrequently from the state in early June (Fig. 26 ) at elevations ranging from 321-467 m asl (Fig. 27 ) and appears to be restricted to Level IV Ecoregions Glaciated Low Allegheny Plateau (60 a) and Finger Lakes Uplands and Gorges in western New York (60 d) (Fig. 28 c ). These records originated from material collected by the late Verne Pechumann at Cornell University in the late 1970 ' s. Further collections in the western portion of the state will likely yield additional records.

Figures

Figure 26. Adult flight period for 19 Chloroperlidae species in New York State. Red fill indicates positive adult collections while gray shaded areas indicate adults are likely present but not reported.

Figure 27. Elevation box plot for 19 Chloroperlidae species in New York State. Boxes indicate interquartile range, horizontal line in box represents median elevation, and outlliers are depicted with large circles.

Figure 28 c. Alloperla imbecilla