Xyleborus insidiosus Cognato & Smith, 2019 Fig. 89E, F, K

Xyleborus insidiosus Cognato & Smith, 2019, (in Cognato et al. 2019): 1280.

Type material.

Holotype (MSUC), paratypes (IZAS, 1; MSUC, 4; NHMUK, 1; NMNH, 3).

Diagnosis.

2.7-2.8 mm long (mean = 2.74 mm; n = 5); 3.0-3.5 × as long as wide. This species is distinguished by declivital interstriae 1 laterally broadened from base to declivital midpoint then narrowing towards apex; large body size; broad discal interstriae, 4 × the width of discal striae; discal strial punctures 3 × the diameter of those of interstriae; declivital striae and interstriae clearly distinguishable, striae clearly impressed; interstriae uniformly granulate, never denticulate; anterior 1/2 of pronotum strongly shagreened; and declivital posterolateral margin carinate to interstriae 6.

Similar species.

Xyleborus glabratus, X. mysticulus .

Distribution.

China (Sichuan), Vietnam.

Host plants.

This species has been collected from Fagaceae as well as unidentified punky wood (Cognato et al. 2019).