Xyleborinus thaiphami Smith, Beaver & Cognato 2020 (in Smith et al. 2020b): 357.
2.8−2.9 mm long (mean = 2.86 mm; n = 5); 2.9−3.11 times as long as wide. This species is distinguished by the declivital face with interstriae 2 armed by granules at declivital summit (1−3 large denticles present in Vietnamese specimens), unarmed on declivital face; declivital interstriae 3 denticles larger than those of interstriae 1, pointed, spine-like; denticles on interstriae 5 large, sharply pointed, spine-like; discal interstriae 1 and 2 unarmed; declivital interstriae 2 flattened; and large size.
This species is nearly identical to Xyleborinus attenuatus and can be distinguished by the declivital interstriae 3 denticles which are acutely pointed rather than incurved, and interstriae 5 denticles never down-curved.
Xyleborinus attenuatus, X. saxesenii, X. subgranulatus, and X. subspinosus
China (Chongqing, Guizhou, Sichuan), Vietnam
known from Pinus armandi (Pinaceae) and undetermined angiosperm trees (Smith et al. 2020b)
Sequences available for COI and CAD.
COI: MN620024; MN620025
CAD: MN620291; MN620292