Helopicus subvarians (Banks, 1920)

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-

Helopicus subvarians (Banks, 1920)

Notes

This species is commonly known as the Vernal Springfly ( Stark et al. 2012), and is broadly distributed from New Brunswick west to Ontario and south to Alabama and Florida ( Kondratieff 2004, DeWalt et al. 2024). Stark and Ray (1983) suggested a univoltine life cycle for this species in Florida. In Ontario, emergence of H. subvarians was recorded from late May to early June ( Harper and Pilon 1970). In New York, adults have been collected from mid-April and extending to late June (Fig. 38 ). State records are available from elevations ranging from 34-464 m asl (Fig. 39 ). Nymphs were commonly collected in the spring months from larger rivers in the Level III Ecoregions Northeastern Highlands (58), Northern Allegheny Plateau (60), and Eastern Great Lakes Lowlands (83) (Fig. 40 d ).

Figures

Figure 38. Adult flight period for 28 Perlodidae species in New York State. Red fill indicates positive adult collections while gray shaded areas indicate adults are likely present but not reported.

Figure 39. Elevation box plot for 28 Perlodidae species in New York State. Boxes indicate interquartile range, horizontal line in box represents median elevation, and outlliers are depicted with large circles.

Figure 40 d. Helopicus subvarians