Microperus cruralis (Schedl, 1975) Smith & Beaver & Cognato, 2020

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 cruralis (Schedl, 1975) comb. nov. Fig. 66G, H, L

Xyleborus cruralis Schedl, 1975b: 456.

Coptodryas cruralis (Schedl): Beaver 1995a: 201.

Type material.

Holotype (NHMW).

New records.

Cambodia: Siem Reap, Angkor Thom, 26.v.2003, J. Constant, K. Smets & P. Grootaert, ex light trap (RABC, 1). Laos: Vientiane, Gi Sion vill., de Tha Ngone, 28.ii.1965, J.L. Gressitt, ex light trap (BPBM, 1).

Diagnosis.

3.0-3.1 mm long (mean = 3.03 mm; n = 3); 2.5-2.82 × as long as wide. This species is distinguished by its large size; elytral disc broadly and deeply transversely impressed with a saddle-like depression from scutellum to declivital base; declivity deeply sulcate, its margins lined by large tubercles on interstriae 1 and 3-6; elytral base emarginated from sutural margin to interstriae 4 to accommodate mycangial tuft, mycangial tuft setae long, very dense; and posterolateral costa absent.

Similar species.

Microperus nugax , M. sagmatus , M. undulatus .

Distribution.

Cambodia*, Laos*, Thailand.

Host plants.

Unknown.

Remarks.

The species is transferred to Microperus because of the following characters: pronotum type 2 (viewed dorsally), antennal club flat, type 3, pronotal disc punctate, and scutellum narrow, minute and convex.

Figures

Figure 66. Dorsal, lateral and declivital view of Microperus alpha, 1.7 - 1.8 mm (A, B, I), M. chrysophylli paratype, 2.6 - 2.7 mm (C, D, J), M. corporaali, 2.55 - 2.9 mm (E, F, K), and M. cruralis holotype, 3.0 - 3.1 mm (G, H, L).