Isoperla transmarina ( Newman, 1838 )

Isoperla transmarina ( Newman, 1838) View in CoL

Notes

Isoperla transmarina is commonly referred to as the Boreal Stripetail ( Stark et al. 2012). This species is distributed in Canada from Newfoundland-Labrador west to British Columbia. In the USA, I. transmarina has been reported from Maine across the Laurentian Great Lakes region to Colorado and south to North Carolina ( Szczytko and Kondratieff 2015, DeWalt et al. 2024). Harper et al. (1991 b) reported a univoltine-slow life cycle for this species in Quebec. Eggs hatched directly with larvae first appearing in June and July, followed by a two-week adult emergence beginning in mid-May. We report an adult flight period for I. transmarina in New York that extends from mid-March through late July (Fig. 38 View Figure 38 ). Reported elevations for this species in the state range from 119-548 m asl (Fig. 39 View Figure 39 ) with records primarily from larger streams and rivers in Level III Ecoregions Northeastern Highlands (58) and Eastern Great Lakes Lowlands (83) (Fig. 44 a View Figure 44 a ).