Ambrosiophilus sexdentatus (Eggers, 1940)

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

Ambrosiophilus sexdentatus (Eggers, 1940) Fig. 15E, F, K

Xyleborus sexdentatus Eggers, 1940: 148.

Ambrosiodmus sexdentatus (Eggers): Wood and Bright 1992: 680.

Ambrosiophilus sexdentatus (Eggers): Hulcr and Cognato 2009: 24.

Type material.

Holotype (NMNH).

Diagnosis.

2.7-3.0 mm long (mean = 2.84 mm; n = 5); 2.7-2.9 × as long as wide. This species is distinguished by declivital interstriae 2 (1 spine), interstriae 3 (2 spines) surrounding declivital sulcus; pronotum from dorsal view basic (type 2); pronotal anterior slope rounded, convex; pronotum anterior margin lacking serrations; pronotum from lateral view tall (type 2); pronotal discal punctures small, fine spaced by at least two diameters of a puncture, surface shiny; declivity strongly sulcate to interstriae 3, lateral margins of sulcus rounded, margin armed with three large spines, one at the base of interstriae 2, one at the declivital midpoint of interstriae 3 and one on the apical 1/3 of interstriae 3.

Similar species.

Ambrosiophilus latisulcatus , A. sulcatus .

Distribution.

Indonesia (Java), New Guinea, Thailand.

Host plants.

Recorded from Quercus ( Fagaceae ) and Tectona ( Lamiaceae ) in Java ( Kalshoven 1959b).

Remarks.

A mycocleptic associate of Beaverium species ( Hulcr and Cognato 2010b, 2013).

Figures

Figure 15. Dorsal, lateral and declivital view of Ambrosiophilus papilliferus holotype, 2.5 mm (A, B, I), A. satoi paratype, 2.5 - 2.75 mm (C, D, J), A. sexdentatus, 2.7 - 3.0 mm (E, F, K), and A. subnepotulus, 2.5 - 2.8 mm (G, H, L).