Nemoura arctica Esben-Petersen, 1910

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-

Nemoura arctica Esben-Petersen, 1910

Notes

This species is commonly referred to as the Arctic Forestfly ( Stark et al. 2012). Grubbs et al. (2018) provided evidence with scanning electron microscopy that N. arctica is a circumpolar, northern Holarctic species. This species was previously recognized as N. trispinosa Claassen, 1923 in eastern North America. The North American range of this species is extensive, reported from Alaska, east across all Canadian provinces, and in the USA from Wyoming east across the Laurentian Great Lakes region to New England states ( Grubbs et al. 2018, DeWalt et al. 2024). Harper (1973 a) found that larvae of N. arctica (as N. trispinosa ) displayed a slow univoltine life cycle in a southern Ontario stream, with peak emergence occurring in mid-June. New York records are available from Level IV Ecoregions Eastern Adirondack Foothills (58 ac), Central Adirondacks (58 ad), Adirondack High Peaks (58 z), Finger Lakes Uplands and Gorges (60 d), and Champlain Lowlands (83 b) (Fig. 17 e ). Adult collection dates range from early April to early August (Fig. 18 ). Reported elevations for this species in the state range from 119-469 m asl (Fig. 19 ).

Figures

Figure 18. Adult flight period for 15 Nemouridae species in New York State. Red fill indicates positive adult collections while gray shaded areas indicate adults are likely present but not reported.

Figure 19. Elevation box plot for 15 Nemouridae species in New York State. Boxes indicate interquartile range, horizontal line in box represents median elevation, and outliers are depicted with large circles.

Figure 17 e. Nemoura arctica