Epipotoneura Williamson 1915

Figures 10, 12, 25–26, 34–35, 36 k–l, 38

Type species: Epipotoneura nehalennia Williamson 1915 by original designation.

Generic characterization. Head. Frons angulate in profile, with carina continued on dorsal surface of antennifer; labium, ventral third of labrum, base of mandibles, genae, anteclypeus, ventral half of antefrons, and triangular spot on anterior surface of antennifer pale yellow; remainder of head including rear of head black; dorsum of head with slight green metallic luster.

Thorax. Pterothorax black, ventral margin of propleuron becoming pale yellow, prosternum light yellow with midventral black spot, postero-lateral margin of prothorax with moderate lobes, not longer than wide, and posterior margin of pronotum smoothly rounded in males, and smoothly convex in known female (Fig. 10). Mesostigmal plates in both male and female flat and simple, with transverse length shorter than width of medial disc. Wings (Fig. 12) about 6 times as long as wide; antenodal space 1 shorter than twice the length of 2, and shorter than or as long as 3; CuA and CuP&AA completely fused to wing margin; MP reaching wing margin within the first cell posterior to vein descending from subnodus; IR2 arising at vein descending from subnodus or just distal to it (intraspecifically variable); IR2 and RP 3 separated by a short crossvein or joined one cell posterior to their origin (intraspecifically variable); divergence of RP-RA (arculus) distal to Ax 2; RP 2 in Fw beginning closer to Px 4–5 (more frequently at 5) and in Hw closer to Px 3; pt shorter than or as long as underlying cell, with its costal side as long as its posterior side or slightly longer. Spurs on femora and tibiae shorter than twice intervening spaces; pretarsal claws with well developed supplementary teeth.

Abdomen. Dorso-laterally entirely or almost entirely black with metallic reflections, except for narrow distal yellow rings on S3–6; latero-ventral portion of terga and sterna pale brown to yellow. Male genital ligula lacking a true inner fold basal to flexure, with a single bifid process (Figs. 25 b–c) or a pair of short membranous inner processes distal to flexure (Figs. 26 b–c), and apex entire with latero-apical corners not projected into lobes (Figs. 25 a–26a). Postero-dorsal margin of male S10 recessed (Figs. 34–35). Male cercus in lateral view as long as or slightly longer than S10 (Figs. 34 a–35a), forcipate in dorsal view (Figs. 34 d–35d), with a sub-basal tooth on its ventro-outer margin (Figs. 34 a–c–35a, c). Male paraproct shorter than half of cercus length, and epiproct shorter than a sixth of cercus, small, and bifid in both male and female (Figs. 34 b, d– e, 35b, d–e, 36l). Female cerci conical, shorter than S10; outer valves of ovipositor with a single row of teeth along distal three fifths; sub-basal plate of ovipositor meeting its counterpart ventrally, with dorsal and ventral sides concave, tip of ovipositor (excluding stylus) extending beyond posterodorsal margin of S10 but not surpassing tip of cerci (Fig. 36 k). Larva unknown.

Diagnosis. See under Drepanoneura .

Distribution. Amazonian forest of Guyana and French Guiana to Brazil (Fig. 38).

Species included. Epipotoneura machadoi sp. nov. and E. nehalennia Williamson 1915