Taxonomic history

Xyleborus ater Eggers, 1923: 210.

Xylosandrus ater (Eggers): Wood 1989: 177.

Cnestus ater (Eggers): Dole and Cognato 2010: 528.


Xyleborus retusiformis Schedl, 1936d: 31. Wood 1989: 177.


3.9−4.1 mm long (mean = 4.0 mm; n = 4); 1.63−1.70 times as long as wide. This species is distinguished by the presence of a mesonotal mycangial tuft on the pronotal base; elytral disc 4−5 times scutellum length; declivity, obliquely truncate; pronotum type 1 when viewed dorsally; antennal club type 2, with 2 sutures visible on posterior face; antennal funicle 4-segmented; protibiae obliquely triangular; procoxae narrowly separated; declivital posterolateral margin weakly carinate from apex to declivital base along interstriae 7; declivital interstriae weakly granulate, setose with 5−6 rows of recumbent hair-like setae on interstriae 2−3; striae indistinct on declivity, striae 1 and 2 impressed; discal punctures dense, confused, surface distinctly reticulate between punctures; and body black with basal part of pronotal disc sometimes orange or brown.

May be confused with

Cnestus gravidus, C. improcerus, C. mutilatus, and C. testudo


Borneo’, China (Fujian), Indonesia (Sumatra), East & West Malaysia

Host plants

polyphagous (Browne 1961b)


Browne (1961b) describes the gallery system and biology.

DNA data

specimens not available for sequencing