Xyleborus inarmatus Eggers, 1923: 209.
Cyclorhipidion inarmatum (Eggers): Beaver et al., 2014: 39.
Xyleborus vagans Schedl, 1977: 504. Smith et al. 2020b: 188.
2.8−3.0 mm long (mean = 2.9 mm; n = 3); 2.8−3.0 times as long as wide. This species is distinguished by the short, steep declivity that is approximately 25% of total elytral length, armed with large tubercles on interstriae 1 and 3, interstriae 2 always unarmed; posterolateral margins rounded; and declivital interstriae 1 setae in two confused rows, interstriae 2 setae uniseriate.
This species is a part of a challenging species group consisting of Cyclorhipidion bodoanum, C. distinguendum, C. pelliculosum, C. tenuigraphum, and C. xeniolum. They can be most readily separated using Smith et al. (2020b) table 1:
declivital interstriae 1 setae
declivital interstriae 2 setae
lateral profile of declivity
declivital interstriae 2 granulate
total length (mm)
2 rows, confused
often on apical third
3 rows, confused
Bhutan, China (Yunnan), India (Himachal Pradesh, West Bengal), Indonesia (Sumatra), Laos, Myanmar, Thailand, Vietnam
recorded from Castanopsis and Quercus (Fagaceae), and probably with a close association with Fagaceae (Beaver et al. 2014)
Sequences available for COI and CAD.