Cyclorhipidion umbratum (Eggers, 1941)

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

Cyclorhipidion umbratum (Eggers, 1941) Fig. 46A, B, I

Xyleborus umbratus Eggers, 1941b: 223.

Cyclorhipidion umbratum (Eggers): Wood and Bright 1992: 704.

Type material.

Holotype (ZMFK).

New records.

China: Fujian, Jianyang, 2.v.1978, Fusheng Huang, ex Lithocarpus dealbatus (NMNH, 3).

Diagnosis.

3.8-4.1 mm long (mean = 4.0 mm; n = 4); 2.53-2.86 × as long as wide. This species is distinguished by the large size; truncate declivity surrounded by a granulate circumdeclivital costa; pronotum subquadrate from dorsal view (type 3); declivital interstrial punctures replaced by a single row of tubercles; declivital strial punctures large, distinct; declivital face with three striae, feebly sulcate on basal 1/4, surface smooth; and declivital striae clearly, uniformly impressed; and interstriae inflated.

Similar species.

Cyclorhipidion amasoides , C. amputatum , C. circumcisum , C. muticum , and C. truncaudinum , all of which are large and have an obliquely truncate or truncate declivity.

Distribution.

China (Fujian).

Host plants.

This species is only known from Lithocarpus ( Fagaceae ).

Figures

Figure 46. Dorsal, lateral and declivital view of Cyclorhipidion umbratum holotype, 3.8 mm (A, B, I), C. vigilans, 5.5 mm (C, D, J), C. xeniolum holotype, 1.65 - 1.8 mm (E, F, K), and C. xyloteroides, 3.25 mm (G, H, L).