Amasa beesoni (Eggers, 1930)

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

Amasa beesoni (Eggers, 1930) Fig. 7C, D, J

Pseudoxyleborus beesoni Eggers, 1930: 207.

Amasa beesoni (Eggers): Wood 1984: 223.

Type material.

Holotype (FRI), paratype (NHMW, 1).

Diagnosis.

5.0 mm long (n = 1); 2.17 × as long as wide. This species is distinguished from all other species in Southeast Asia, except the Malaysian species, A. glauca (Sampson, 1921), by the completely divided eye. It is easily distinguished from A. glauca by the presence of a small tooth on the first interstriae at the top of the declivity, the impressed declivital striae, and densely punctured declivital interstriae.

Similar species.

Amasa glauca (from Indomalayan region), A. opalescens .

Distribution.

‘Borneo’, West Malaysia, Myanmar, Thailand.

Host plants.

The only host records are from the family Sapindaceae ( Nephelium , Xerospermum ), and the species may have a fixed host association with this family ( Browne 1961b).

Figures

Figure 7. Dorsal, lateral and declivital view of Amasa aspersa, 3.7 - 3.9 mm (A, B, I), A. beesoni paratype, 5.0 mm (C, D, J), A. concitata, 4.3 - 4.5 mm (E, F, K), and A. cycloxyster holotype, 3.4 mm (G, H, L).