Cryptoxyleborus percuneolus (Schedl, 1951)

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Cryptoxyleborus percuneolus (Schedl, 1951) Fig. 38G, H, L

Xyleborus percuneolus Schedl, 1951a: 85.

Xyleborinus percuneolus (Schedl): Wood and Bright 1992: 809.

Cryptoxyleborus percuneolus (Schedl): Beaver and Hulcr 2008: 145.

Type material.

Lectotype (NHMW).

Diagnosis.

1.4 mm long (n = 1); 2.55 × as long as wide ( Sittichaya et al. 2019). This species is distinguished by its minute size; elytral pit mycangia absent; antennal funicle 3-segmented; elytral interstriae distinctly seriate punctate, without very densely placed punctures at the base.

Similar species.

Cryptoxyleborus confusus , Fraudatrix simplex .

Distribution.

Indonesia (Java), East Malaysia, Thailand.

Host plants.

No host records are known but hosts are presumably similar to other Cryptoxyleborus which are specific to Dipterocarpaceae ( Beaver and Hulcr 2008).

Remarks.

One gallery system investigated consisted of an unbranched entrance tunnel leading to a single terminal brood chamber enlarged in the longitudinal plane, with multiple tunnels extending further into the wood ( Beaver and Hulcr 2008).

Figures

Figure 38. Dorsal, lateral and declivital view of Cryptoxyleborus barbieri lectotype, 2.15 - 2.5 mm (A, B, I), C. confusus, 2.0 mm (C, D, J), C. eggersi paralectotype, 3.5 - 4.4 mm (E, F, K), and C. percuneolus, 1.4 mm (G, H, L).