Comprehensive Description

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Description

 Length: 1.75–2.37 mm, width: 1.56–2.09 mm; body piceous, broadly rounded; frons shallowly depressed at middle, with fine, sparse ground punctation; frontal stria with sides divergent, rounded, sinuate over antennal bases, arcuate across front; supraorbital stria fine, rounded dorsad, detached from sides of frontal stria; epistoma moderately convex; labrum about twice as wide as long, asymmetrically emarginate apically, projecting beneath; left mandible untoothed, right mandible with small, subacute basal tooth; pronotum lacking prescutellar impression, with fine, sparse ground punctation, lacking lateral pronotal punctures; anterior margin of pronotum very weakly projecting at middle; marginal pronotal stria generally broadly interrupted behind head, may be weak and fragmented; submarginal pronotal stria continuous, complete along lateral and anterior margins, marginal bead convex; median pronotal gland openings about three-fourths pronotal length behind anterior margin; elytra with two complete epipleural striae, outer subhumeral stria complete, inner subhumeral stria present in apical half, fine, dorsal striae 1-3 complete, 4th stria present in apical third or slightly more, 5th stria present in apical half, sutural stria present in apical three-fourths; prosternal keel very weakly projecting at base, carinal striae complete, broadly separated at base, meeting in rather narrow anterior arch; anterior metaventral margin broadly, very shallowly emarginate, marginal stria complete; mesometaventral stria arched forward at middle short of mesoventral midpoint, sinuate laterally, continued obliquely posterolaterad toward outer corner of metacoxa, abbreviated at apex; 1st abdominal ventrite with two lateral striae, both abbreviated posteriorly, with small fovea near inner corner of metacoxa; propygidium with fine, moderately sparse ground punctation and irregularly oval, shallow punctures over most of disk separated by one-fourth their diameters or slightly more; pygidium with fine, dense ground punctation, lacking coarser punctures except along basal margin; marginal pygidial sulcus deep, but rather fine along most of margin, ending in large, transversely oval basal foveae. Male genitalia (Figs 65E–F, H): accessory sclerites absent; T8 about twice as long as broad, basal membrane attachment line slightly distad basal emargination, apical emargination narrow, shallow, ventrolateral apodemes most strongly developed near base, narrowed to apex, not meeting at midline; S8 with apical guides divergent, strongly and somewhat abruptly expanded near apex, bearing a couple setae; T9 with apices weakly convergent, slightly enlarged and apically truncate, ventrolateral apodemes well developed; T10 with halves fused along basal part of midline; S9 broad, evenly widened to base and apex, with distinct apical emargination, apical flanges separate, more strongly sclerotized along midline and lateral margins; tegmen with sides evenly converging from near base to apex, with strong, narrow medioventral process projecting strongly beneath; median lobe large, nearly as long as tegmen, with wide gonopore, proximal apodemes differentiated into short, thick portion, with proximal arms prominent, sinuate; basal piece short, about one-third tegmen length. 

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© Michael S. Caterino, Alexey K. Tishechkin

Source: ZooKeys

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