Comprehensive Description

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 Length: 1.68–1.75 mm, width: 1.50–1.55 mm; body rufescent, broadly rounded, strongly convex, with very fine granulate microsculpture on most surfaces; frons broad, weakly depressed at middle, sides of frontal stria rounded, curving evenly, transverse across front; supraorbital stria complete, connected to sides of frontal stria; epistoma weakly depressed, slightly elevated at sides, weakly emarginate apically; labrum about 2.5× as wide as long, flat, weakly emarginate apically; left mandible with broad, blunt basal tooth, right with slightly smaller, subacute tooth; pronotum lacking prescutellar impression, with only very faint, shallow lateral punctures; marginal pronotal stria continuous along all edges; lateral submarginal pronotal stria complete, close to margin, subcarinate, continuous with anterior submarginal stria, pronotal disk depressed along their inner edges; median pronotal gland openings faintly annulate, located about two-thirds pronotal distance behind anterior margin; elytron with two complete, crenulate epipleural striae, outer subhumeral stria carinate, forming lateral elytral margin continuous with lateral pronotal margin, inner subhumeral stria absent, dorsal striae 1-5 complete, rather broadly depressed, with outer edge of stria strongly carinate, sutural stria obsolete in basal third, similarly deeply impressed, all striae converging toward midline apically; elytral disk with numerous coarse punctures near apical margin; prosternal keel truncate at base, with carinal striae complete, divergent and free basally and apically; prosternal lobe very short, with marginal stria weak to obsolete; mesoventrite broadly and shallowly emarginate along anterior margin, with marginal stria very close to margin, weak at middle; mesometaventral stria broadly arched forward to anterior mesoventral margin, meeting inner corner of mesocoxa at side, continued by lateral metaventral stria which extends laterally, parallel to postmesocoxal stria, strongly abbreviated; metaventrite moderately convex; 1st abdominal ventrite with two lateral striae, depressed along complete inner lateral stria, outer stria obsolete basally; propygidium uniformly and densely covered with coarse punctures; pygidium with fewer and sparser punctures, mainly at sides, impunctate toward apex; marginal pygidial sulcus well impressed along most of margin, obsolete toward base. Male genitalia (Figs 81A–D, G): accessory sclerites present; T8 short, with sides subparallel in basal two-thirds, abruptly narrowed to apex, apical emargination narrow, basal emargination nearly reaching basal membrane attachment line, ventrolateral apodemes evenly developed to base and apex, nearly meeting along midline; S8 elongate, subparallel, with apical guides well developed throughout most of length, ventral edges divergent to apex; T9 with sides subparallel in basal third, convergent to apex, apices narrow, opposing; T10 with halves fully separate; S9 broadened in basal half, weakly rounded at base, lacking apical emargination, apical flange entire; tegmen narrow, with sides rounded, widest just basad midpoint, ventromedial projection weak, ‘U’-shaped, barely projecting beneath about one-fourth from base; median lobe about one-third tegmen length, proximal apodemes not obviously differentiated; basal piece almost one-half tegmen length. 


Creative Commons Attribution 3.0 (CC BY 3.0)

© Michael S. Caterino, Alexey K. Tishechkin

Source: ZooKeys

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