Suwallia marginata ( Banks, 1897 )

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-

Suwallia marginata ( Banks, 1897)

Notes

Suwallia marginata is commonly known as the York Sallfly ( Stark et al. 2012). This species has been reported in Canada from New Brunswick and mainland Labrador west to Ontario and in the USA from Maine south to Georgia ( Alexander and Stewart 1999, Surdick 2004, DeWalt et al. 2024). Surdick (2004) reported adult collections of this species from June to September. Our records from New York indicate a flight period extending from early June to late August (Fig. 26 ). This species has been recorded from streams ranging from 125-570 m asl (Fig. 27 ) from Level IV Ecoregions Catskill High Peaks (58 y), Northern and Western Adirondack Foothills (58 ab), Finger Lakes Uplands and Gorges (60 d), and Cattaraugus Hills (60 f) (Fig. 29 e ). This species is likely more common in the state than current collections indicate.

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 29 e. Suwallia marginata