Troctopsocoides n.gen.

Diagnosis. With the characters of family Troctopsocidae . Differing from all other genera of the family in posterodistal (instead of distal) orientation of vein R4+ 5 in the hindwing (Figs 2, 12). Antennae 13-segmented; f1 approximately equals f 2 in length. P2 straight and somewhat thickened; P4 bullet-shaped (Fig. 4). Wings membranous; forewing with scattered spots, some tending to form transverse lines (Figs 1, 11); first segment of vein Rs in hindwing absent. Fore tibia and fore t1 lacking longitudinal row of stout setae; pretarsal claws of each foot structurally equal, each with a major (outer) and minor (inner) preapical denticle (as in Fig. 6). Subgenital plate triangular (Figs 7, 13). See also the generic key.

Structures visible on the extant, but not in the fossil species: subgenital plate with four stout apical setae; Tshaped sclerite present, with short arms (Fig. 7); in ovipositor valvulae, v2 and v3 fused in basal half; v3 only moderately bilobed at apex.

Type species. Troctopsocoides erwini n.sp.