Operclipygus quadratus Caterino & Tishechkin 2013

Length: 1.93–2.00 mm, width: 1.34–1.56 mm; body rufobrunneus, broad, depressed, subquadrate, densely punctate on all surfaces; frons depressed at middle, frontal stria divergent, rounded between eyes, complete, transverse across front, continuous with complete supraorbital stria; epistoma broadly depressed, elevated at sides and along apical margin; labrum about half as long as wide, with sides rounded, apex shallowly emarginate; left mandible with prominent, acute basal tooth, right mandible untoothed, with apex frequently narrow, elongate; pronotal disk with indistinct prescutellar impression; marginal stria interrupted behind head; lateral submarginal pronotal stria complete, very close to margin, subcarinate, curving inward at front, meeting anterior submarginal stria at distinct postocular angulation; anterior submarginal stria transverse, ends not recurved posterad; median pronotal gland openings within postocular angulation of striae; elytra with all striae impressed as pair of dense rows of interconnected punctures; one complete epipleural stria present, outer subhumeral complete beneath strong lateral elytral margin (apparently representing complete inner subhumeral stria), dorsal striae 1-5 complete, sutural stria and marginal carina connected by a complete, fine apical marginal stria; prosternal keel produced posteriorly, truncate at base, carinal striae deeply impressed, meeting at acute angle in front; prosternal lobe with midline elevated, apex distinctly, narrowly emarginate, marginal stria interrupted by emargination; mesoventrite deeply emarginate anteriorly, marginal stria interrupted by anteriorly arched, deeply impressed, crenulate mesometaventral stria; lateral metaventral stria reaching middle of metacoxa; 1st abdominal ventrite with two complete lateral striae; propygidium and pygidium similarly densely, uniformly covered with small punctures; marginal pygidial sulcus complete, fine. Male genitalia (Fig. 25): accessory sclerites absent; T8 rather short, sides moderately convergent to apex, basal apodemes rounded, basal emargination subangulate, basal membrane attachment line distad emargination by about one-third its depth, ventrolateral apodemes most strongly produced at middle, nearly meeting at midline, apical emargination simple; S8 very much like Operclipygus hospes, sides broadly rounded in basal two-thirds, apical guides narrow, only developed near apex, ventrally halves approximate for short distance near base, weakly diverging to apex; T9 with sides in contact for short distance along dorsal midline, apices narrow, truncate; T10 divided; S9 narrowest just basad middle, basal half strongly widened, broadly rounded, largely desclerotized, lateral flanges with prominent apical corners, apex with narrow, shallow median emargination, apical flanges small and separate; tegmen rather narrow, elongate, widest just distad midpoint, narrowed to base, apex subacute, with subapical, ventrolateral cleft, medioventral process long with very narrowly truncate apex projecting beneath about one-third from base; basal piece about one-third tegmen length; median lobe about one-third tegmen length, with filamentous portions of proximal apodemes not apparent.