Taxonomy

Arixyleborus Hopkins, 1915a: 59.

Synonyms

Xyleboricus Eggers, 1923: 212. Schedl, 1952d: 162.

Diagnosis

1.35−5.2 mm long, 2.0−3.5 times as long as wide. Arixyleborus can be distinguished by the elytra with distinctive deep strial furrows and interstrial ridges, ridges either granulate or carinate. Arixyleborus can be further diagnosed by the obliquely truncate antennal club with segment 1 almost covering the posterior face (type 2), club broader than tall or as tall as wide; protibia slender or evenly rounded, posterior face flat and unarmed or inflated and granulate; scutellum variable either flush with elytra and flat, flush with elytra and medially impressed or flat and depressed below elytra; elytra from dorsal view typically angulate, rarely rounded; mycangial tufts absent; and procoxae contiguous.

Arixyleborus is similar to Stictodex with which it shares a broad antennal club but which lacks the distinctive elytral ridges and furrows.

May be confused with

Cnestus, Pseudowebbia, Stictodex, Truncaudum, and Webbia

Distribution

throughout tropical Asia and Oceania

Gallery system

An unbranched radial or curved entrance tunnel, sometimes with a few branches. As the larvae develop, their feeding activity extends part of the main gallery into a single longitudinal brood chamber usually approximately rectangular in shape and the width of the main gallery (Browne 1961b).