Pterobius itiokai Murayama 2010

Description. Length 3.05–3.30 mm. Body (Figs 1–2) elongate oval, reddish brown, glabrous shining. Head strongly gibbose medially; clypeal margin narrowly reflexed, broadly rounded on each side of shallow, median emargination; sides distinctly emarginate in front of right-angled, protruding genae; clypeal surface densely and finely punctate, with microreticulations. Pronotum rectangular, convex, side margin narrowly deplanate; posterior angles broadly rounded; surface punctures variably-sized, coarse and deep mesally, separated by 1–3 times their diameters. Scutellum narrowly subtriangular. Elytra slightly wider than base of pronotum and about 2.3 times as long as pronotum, epipleural margin slightly reflexed, forming obtuse tooth at shoulder; striae finely impressed, strial punctures coarse, deep; intervals slightly convex, smooth, impunctate. Ventral sclerites shining; mesosternum gibbose and smooth in anterior half, posterior half concave, finely and sparsely punctate, at middle with triangular, smooth convexity prolonged to metasternum; metasternum convex, midline fine; surface finely and sparsely punctate; abdominal sternites with fine fluting along sutures and smooth, impunctate surface including that of pygidium. Legs (Figs 5–7) short; all femora sparsely and finely punctate; profemur subquadrate; meso- and metafemora with posterior lines; metatarsus stout, 2/3 times as long as tibia. Male. Penultimate abdominal sternite and disc of pygidium shorter than female; aedeagus as in Figs 8–9.