Taxonomic history

Xylosandrus beesoni Saha, Maiti, and Chakraborti, 1992: 11.

Diagnosis

2.2−2.7 mm long (mean = 2.43 mm; n = 4); 2.0−2.25 times as long as wide. This species can be distinguished by its moderate size; elytral disc flat, longer than declivity; declivital face steep, abruptly separated from disc; elytra appearing obliquely truncate; posterolateral margins of elytra carinate to interstriae 7; declivital face with four apparent granulate striae (striae 5 short, converging with striae 4 forming a loop); declivital face convex, striae setose, setae semi-recumbent hairs and less than the width of an interstria; interstriae granulate, granules multiseriate, confused with a uniseriate row of erect hair-like setae longer than the width of 1.5 interstriae and confused semi-erect hairs equal to the width of an interstria; strial granules two times larger than those of interstriae; pronotum longer than wide, from dorsal view conical frontally (type 6) and lateral view taller (type 2), summit at basal quarter, basal quarter shagreened, dull, densely punctate; and broad, dense mycangial tuft on the pronotal base.

May be confused with

Xylosandrus borealis, X. discolor, X. diversepilosus, X. jaintianus, and X. subsimiliformis

Distribution

India (Arunachal Pradesh, West Bengal), Thailand, Vietnam

Host plants

recorded only from Symplocos (Symplocaceae) (Maiti and Saha 2004)

Remarks

This species was collected in great abundance by SMS and AIC in Lao Cai province, Vietnam. In nearly all collecting events the species was found in small branches (1−5 cm) in diameter that were dry and often exposed to full sun, an unusual feeding habit, as most other xyleborines are unable to thrive under these conditions. Thai specimens were recorded as Xylosandrus subsimiliformis by Dole and Cognato (2010) and Beaver et al. (2014).

DNA data

Sequences available for COI and CAD.

COI: MN620061MN620062

CAD: MN620328