Isoperla arcana and Isoperla borisi (Plecoptera: Perlodidae), two new stonefly species from North Carolina, U.S.A. with notes on the distribution of Isoperla powhatan.

摘要

Two new perlodid stonefly species, Isoperla arcana Beaty, Holland, Lenat, 2017 and I. borisi Beaty, Holland, Lenat, 2017, are described from North Carolina, U.S.A. Associated images, scanning electron micrographs, and illustrations of reared adult males, females, larvae, and eggs are presented for each species. In addition, a map is included depicting the North Carolina distributions of each species. Adult males of the recently described I. powhatan Szczytko and Kondratieff, 2015 were also reared from larvae collected from a North Carolina stream. This represents a range extension for I. powhatan, previously known only from Pennsylvania and Virginia. Including Isoperla borisi sp. nov., I. arcana sp. nov. and the range extension of I. powhatan, thirty Isoperla species are now known from North Carolina.