Taxonomic history

Xyleborus discolor Blandford, 1898: 429.

Xylosandrus discolor (Blandford): Browne, 1963: 55.

Synonyms

Xyleborus posticestriatus Eggers, 1939b: 119. Dole and Cognato, 2010: 488.

Diagnosis

2.0−2.4 mm long (mean = 2.02 mm; n = 5); 2.0−2.29 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; declivital striae setose, setae semi-recumbent hairs and equal to the width of an interstria; interstriae granulate, granules multiseriate, confused, with a uniseriate row erect bristles equal in length to the width of an interstria; strial granules at least 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 beesoni, X. borealis, and X. diversepilosus

Distribution

From the Indian subcontinent and southern China through Southeast Asia and Indonesia west of Wallace’s line, Philippines, Taiwan. Presumably imported to Australia. Within the study region, recorded from China (Chongqing, Fujian, Guangdong, Hainan, Hong Kong, Jiangxi, Sichuan, Yunnan), India (Andaman Is, Assam, Karnataka, Meghalaya, Sikkim, Tamil Nadu, Uttarakhand, West Bengal), Laos, Myanmar, Taiwan, Thailand, Vietnam. Also recorded from Australia, Japan (Ryukyu Is.), Indonesia, Malaysia, New Guinea, Philippines, Sri Lanka.

Host plants

polyphagous (Dole and Cognato 2010)

Remarks

The biology is described by Kalshoven (1959b) and Browne (1961a). Le Pelley (1968) notes that the species attacks green, living branches of coffee in Sri Lanka, but is not considered an important pest.

DNA data

Sequences available for COI and CAD.

COI: GU808721GU808712MN620080

CAD: GU808643