Diuncus dossuarius (Eggers, 1923)

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

Diuncus dossuarius (Eggers, 1923) Fig. 49E, F, K

Xyleborus dossuarius Eggers, 1923: 187.

Diuncus dossuarius (Eggers): Hulcr and Cognato 2009: 30.

Type material.

Paratype (NHMUK).

Diagnosis.

2.6 mm long (mean = 2.6 mm; n = 5); 2.0-2.17 × as long as wide. This species is distinguished by the elytral summit transversely impressed with a saddle-like depression; declivital base armed by two pairs of denticles, one pair on interstriae 2 and the other on interstriae 3; bicolored elytra and pronotum that are darker on the apical areas; interstrial setae recumbent, finer, almost hair-like, in two or three confused rows on interstriae 2-4; and striae setose, setae similar to those of interstriae.

Similar species.

Diuncus corpulentus , D. javanus .

Distribution.

Brunei, Philippines, Vietnam.

Host plants.

Recorded from Swietenia , Toona ( Meliaceae ), and Ficus ( Moraceae ) ( Schedl 1966a; Nobuchi 1979).

Figures

Figure 49. Dorsal, lateral and declivital view of Diuncus ciliatoformis lectotype, 1.65 - 1.95 mm (A, B, I), D. corpulentus, 1.6 - 3.2 mm (C, D, J), D. dossuarius, 2.6 mm (E, F, K), and D. haberkorni, 1.9 - 2.8 mm (G, H, L).