Amphinemura nigritta (Provancher, 1876)

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-

Amphinemura nigritta (Provancher, 1876)

Notes

This species is commonly referred to as the Little Black Forestfly ( Stark et al. 2012). The distribution of A. nigritta extends from mainland Labrador and the Canadian Maritime Provinces west to Michigan and southward to Alabama and Mississippi, with western extensions to Missouri and Arkansas ( DeWalt et al. 2024). Harper (1973 a) reported a univoltine life cycle for A. nigritta in an intermittent stream in southern Ontario, with emergence dates ranging from mid-May to early July. In New York, adults have been collected from mid-April to early August (Fig. 18 ). This species was collected commonly from coastal streams on Long Island and smaller streams and rivers throughout the state (Fig. 17 c ), occupying a wide range of elevations from 2-663 m asl (Fig. 19 ). Larvae were often found in submerged leaf packs and other in-stream organic material.

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 c. Amphinemura nigritta