Cyclorhipidion circumcisum (Sampson, 1921)

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 circumcisum (Sampson, 1921) Fig. 41A, B, I

Xyleborus circumcisus Sampson, 1921: 30.

Cyclorhipidion circumcisum (Sampson): Wood and Bright 1992: 698.

Xyleborus obtusus Eggers, 1923: 172. Synonymy: Browne 1959: 97.

Xyleborus subobtusus Schedl, 1942a: 192. Synonymy: Beaver 2011: 283.

Type material.

Holotype Xyleborus circumcisus (NHMUK).

Diagnosis.

3.3-3.5 mm long (mean = 3.43 mm; n = 5); 2.54-2.83 × as long as wide. This species is distinguished by the large size; declivity obliquely truncate, strongly shagreened and dull; pronotum longer than wide and basic from dorsal view (type 2); declivital interstriae densely covered in multiseriate rows of tubercles.

Similar species.

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

Distribution.

Indonesia (Java, Sumatra), East & West Malaysia, Philippines, Thailand.

Host plants.

The species has a strong preference for Fagaceae ( Castanopsis , Lithocarpus , Quercus ) ( Browne 1961b). There are single records from Canarium ( Burseraceae ), and an unidentified tree of the same family ( Browne 1986; Ohno 1990).

Figures

Figure 41. Dorsal, lateral and declivital view of Cyclorhipidion circumcisum, 3.3 - 3.5 mm (A, B, I), C. denticauda holotype, 2.95 - 3.1 mm (C, D, J), C. distinguendum, 2.5 - 3.1 mm (E, F, K), and C. fouqueti lectotype, 1.8 mm (G, H, L).