Streptocranus fragilis Browne, 1949

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 fragilis Browne, 1949 Fig. 75E, F, K

Streptocranus fragilis Browne, 1949: 901.

Coptoborus fragilis (Browne): Wood and Bright 1992: 663.

Streptocranus fragilis (Browne): Hulcr et al. 2007: 582.

Type material.

Holotype (NHMUK).

New records.

China: Fujian, Fuzhou, 19.iv.2018, Y. Li, ex Liquidambar formosana (UFFE, 1). S Yunnan, Xishuangbanna, 28 km NW Jinghong, vic. An Ma Xi Zhan (NNNR), 22°12'N, 100°38'E, 700 m, forest, EKL, 5.iv.2009, L. Meng (RABC, 1).

Diagnosis.

1.9-2.15 mm long (mean = 2.03 mm; n = 5); 4.3-4.75 × as long as wide. This species is distinguished by its small size; elytra with sides nearly parallel from base to apex; declivital interstriae 1 and 3 unarmed; and elytral distal projection short, rounded, weakly carinate.

Similar species.

Streptocranus bicolor , S. mirabilis , S. petilus .

Distribution.

Brunei, China* (Fujian, Yunnan), East & West Malaysia, Thailand.

Host plants.

Recorded from Eugenia ( Myrtaceae ), Palaquium ( Sapotaceae ) ( Browne 1961b), and Liquidambar ( Altingiaceae ).

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).