Microperus nudibrevis (Schedl, 1942)

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

Microperus nudibrevis (Schedl, 1942) Fig. 68E, F, K

Xyleborus nudibrevis Schedl, 1942a: 195.

Coptodryas nudibrevis (Schedl): Wood and Bright 1992: 825.

Microperus nudibrevis (Schedl): Beaver et al. 2014: 55.

Type material.

Holotype (NHMW).

New records.

China: Hong Kong, Tai Po Kau, vi.2017, J. Skelton (MSUC, 2). Japan: Okinawa, Yona, xi.2011, J. Hulcr, ex Castanopsis (MSUC, 1). Vietnam: Dong Nai, Cat Tien N.P., 11.42232, 107.42834, 128 m, 19.ii.2017, VN74, A.I. Cognato, T.A. Hoang, ex bottle trap (MSUC, 1).

Diagnosis.

1.5-1.6 mm long (mean = 1.53 mm; n = 5); 2.5-2.91 × as long as wide. This species is distinguished by the elytral disc flat with short and steep obliquely truncate declivity; posterolateral carina strong and denticulate; declivital interstriae straight from base to apex, never laterally broadened; declivital interstriae densely granulate, granules uniformly sized and spaced from declivital summit to elytral apex; and declivital face opalescent, subshiny.

Similar species.

Microperus kirishimanus , M. latesalebrinus , M. perparvus .

Distribution.

China* (Hong Kong), Japan*, East & West Malaysia, Thailand, Vietnam*.

Host plants.

Recorded from five genera in five different families of trees, and presumably polyphagous ( Beaver et al. 2014).

Remarks.

Browne (1961a) suggests that the female lays eggs in clusters over a considerable period, the offspring from each cluster occupying a separate brood chamber.

Figures

Figure 68. Dorsal, lateral and declivital view of Microperus latesalebrinus holotype, 1.6 mm (A, B, I), M. minax holotype, 1.95 - 2.0 mm (C, D, J), M. nudibrevis, 1.5 - 1.6 mm (E, F, K), and M. nugax, 1.8 - 1.9 mm (G, H, L).