Arixyleborus granulifer (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

Arixyleborus granulifer (Eggers, 1923) Fig. 25G, H, L

Xyleborus granulifer Eggers, 1923: 206.

Arixyleborus granulifer (Eggers): Browne 1955: 350.

Type material.

Lectotype (NMNH).

Diagnosis.

1.9-2.0 mm long (mean = 1.98 mm; n = 5); 2.11-2.44 × as long as wide. This species is distinguished by the protibiae posterior faces flat, unarmed; antennal club as broad as tall; posterolateral carina oblique, granulate; elytral disc flat, without a transverse depression; striae not impressed; declivital interstriae bearing a row of short erect bristles and longer semi-erect hair-like setae, setae as long as an interstrial width.

Similar species.

Arixyleborus hirsutulus , A. sittichayai .

Distribution.

‘Borneo’, Indonesia (Mentawai Is, Sulawesi, Sumatra), East & West Malaysia, Philippines, Sri Lanka, Thailand.

Host plants.

Polyphagous. Ohno (1990), for example, records twenty different genera in fifteen different families.

Remarks.

Browne (1961b) describes the gallery system, and notes that the life cycle takes approximately 8 weeks.

Figures

Figure 25. Dorsal, lateral and declivital view of Arixyleborus crassior holotype, 2.0 mm (A, B, I), A. grandis, 3.2 - 3.5 mm (C, D, J), A. granifer, 2.8 - 3.0 mm (E, F, K), and A. granulifer, 1.9 - 2.0 mm (G, H, L).