Alloperla concolor Ricker, 1936

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 concolor Ricker, 1936

Notes

Alloperla concolor is commonly known as the Duckhead Sallfly ( Stark et al. 2012). The distribution of this species extends in Canada from Labrador west to Ontario and southeast along the Appalachian Mountains to Virginia and West Virginia ( Surdick 2004, DeWalt et al. 2024). Previous reports of A. neglecta Frison, 1935 from New York pertain to A. concolor ( Kondratieff and Kirchner 1993) . Harper and Pilon (1970) reported emergence of adults from mid-May to early June in a Quebec stream. Adults have been collected frequently from New York between early June and mid-August (Fig. 26 ) from a broad range of elevations from 148-1623 m asl (Fig. 27 ). This species is widespread in Level III Ecoregions Northeastern Highlands (58) and Northern Allegheny Plateau (60) (Fig. 28 a ) and is likely more common in western areas of the state.

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 a. Alloperla concolor