Stonefly Species Zealeuctra warreni (Tiny Winter Blacks)

Source: A review of the Nearctic genus Zealeuctra Ricker (Plecoptera, Leuctridae), with the description of a new species from the Cumberland Plateau region of eastern North America

Male - abdominal tergal cleft. Anterior portion broadly-rounded and U-shaped. Posterior portion V-shaped, with small crenulations evident along inner margins, terminating posteriorly with paired, subtriangular, medially-projected extensions (Fig. 10 A). Male - epiproct. Base broad and flanged laterally (Fig. 10 A), with paired spines both originating from base, posterior spine ca. 2 x length of anterior spine, moderately recurved anteriorly (Fig. 10 B), anterior spine straight and bifurcated slightly at tip, with the paired terminal ends bearing four thick spines at tip (Fig. 10 C).

Female - 7 th sternum. Seventh sternum lacking medial lobe, with posteromedial portion overlapping as a broadly-triangular flap onto anteromedial margin of the eighth sternum (Fig. 10 D).