Isoperla montana (Banks, 1898)

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-

Isoperla montana (Banks, 1898)

Notes

Isoperla montana is currently known as the Montane Stripetail ( Stark et al. 2012). This species has been reported from Nova Scotia west to Ontario, Minnesota, and Indiana, and southeast along the Appalachian Mountains to Virginia ( Szczytko and Kondratieff 2015, Verdone and Kondratieff 2017, DeWalt et al. 2024). Harper et al. (1991 b) found that larvae of I. montana displayed a univoltine-slow life cycle in Quebec. In their study, early instar larvae first appeared in June and July directly following the emergence of adults in May. In New York, the adult flight period extends from late March through late July (Fig. 38 ). Isoperla montana has been reported from elevations ranging from 3-544 m asl (Fig. 39 ) and appears to be widely distributed across the state (Fig. 42 e ).

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 42 e. Isoperla montana