Amasa opalescens (Schedl, 1937)

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 opalescens (Schedl, 1937) Fig. 9C, D, J

Xyleborus opalescens Schedl, 1937a: 550.

Amasa opalescens (Schedl): Wood and Bright 1992: 684.

Type material.

Lectotype (NHMW).

Diagnosis.

4.5-4.8 mm long (4.7 mm long; n = 3); 2.4-2.5 × as long as wide. This species is distinguished by its large size; pronotum rounded, robust from lateral view (type 5); declivital interstriae 1 unarmed (lacking granules) and flat; declivital strial punctures very large, irregularly spaced; and declivital surface appearing smooth and opalescent.

Similar species.

Amasa beesoni , A. cylindrotomica , A. schlichii .

Distribution.

East & West Malaysia, Thailand, Vietnam.

Host plants.

Recorded only from species of Eugenia and Tristania ( Myrtaceae ), and possibly with a fixed association with this family ( Browne 1961b).

Figures

Figure 9. Dorsal, lateral and declivital view of Amasa lini holotype, 3.5 mm (A, B, I), A. opalescens lectotype, 4.5 - 4.8 mm (C, D, J), A. resecta, 2.85 - 3.2 mm (E, F, K), and A. schlichii, 2.9 - 3.5 mm (G, H, L).