Streptocranus bicuspis (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

Streptocranus bicuspis (Eggers, 1940) Fig. 75C, D, J

Xyleborus bicuspis Eggers, 1940: 153.

Coptoborus bicuspis (Eggers): Wood and Bright 1992: 662.

Streptocranus bicuspis (Eggers): Hulcr et al. 2007: 582.

Streptocranus recurvus Browne 1949: 898. Synonymy: Schedl 1950b: 893.

Type material.

Lectotype Xyleborus bicuspis (NHMW), paralectotype (NMNH).

Diagnosis.

2.2-3.4 mm long (mean = 2.87 mm; n = 4); 3.85-4.25 × as long as wide. The species is distinguished by the unique elongate elytral processes, strongly tapering, strongly curved dorsad, and with an acutely pointed tip.

Similar species.

None.

Distribution.

‘Borneo’, Indonesia (Java), West Malaysia, Thailand.

Host plants.

Recorded only from Castanopsis ( Fagaceae ) ( Browne 1961b).

Figures

Figure 75. Dorsal, lateral and declivital view of Streptocranus bicolor, 2.4 - 3.6 mm (A, B, I), S. bicuspis lectotype, 2.2 - 3.4 mm (C, D, J), S. fragilis holotype, 1.9 - 2.15 mm (E, F, K), and S. mirabilis lectotype, 4.1 - 4.9 mm (G, H, L).