Operclipygus sinuatus Caterino & Tishechkin 2013

This species is very similar in most characters to Operclipygus mirabilis and is only described to the extent that it differs. Length: 1.90–2.15 mm, width: 1.59–1.78 mm; head with supraorbital stria weakly impressed, barely detached from frontal stria at sides; pronotal disk depressed at base, but basal plicae weak to indistinct; anterior submarginal pronotal stria absent, anterior marginal stria complete behind head; male with granulate sculpturing along anterior margin of pronotum, with divergent, sinuate, elongate depressions extending posterad leading to the median pronotal gland openings halfway to posterior margin; coarse lateral discal punctures of pronotum few to absent; female with more distinct lateral coarse punctures, a few fragments of anterior submarginal pronotal stria frequntly visible at sides, and with median gland openings about one-fifth from anterior margin, with very shallow, indistinct impression anterior of them; elytra with inner subhumeral stria absent, sutural stria obsolete in basal third, not meeting basal arch of 5th stria; apical punctures of elytral disk more numerous and diffuse; prosternal carinal striae variably shortened anteriorly, especially in males, meeting in a narrow arch just anterad midpoint of keel; base of keel truncate, not at all projecting posterad, anterior margin of mesoventrite correspondingly truncate, or even very weakly projecting at middle; mesometaventral stria more angulate than rounded at middle, reaching basal third of mesoventral disk; metaventral disk with secondary, outer lateral stria parallel to lateral stria in its basal half; pygidium with ground punctation very conspicuous, marginal pygidial stria present, obsolete in basal corners. Male genitalia (Figs 10D, G) with apical guides of S8 slightly narrower apically than in Operclipygus mirabilis, aedeagus more strongly hooked at apex.