Cyclorhipidion tenuigraphum (Schedl) stat. res.

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 tenuigraphum (Schedl) stat. res. Fig. 45E, F, K

Xyleborus tenuigraphus Schedl, 1953c: 29.

Cyclorhipidion tenuigraphus (Schedl): Beaver and Liu 2010: 24 (as a synonym of C. fukiense ).

Type material.

Lectotype Xyleborus tenuigraphus (NHMW).

New records.

China: Yunnan, Lijiang, v.1975, Zhizhong Zhang, ex Pistacia weinmannifolia (NMNH, 1). India: Assam, 4 mi N. Cherrapunji, 1378 m, 3.x.1961, E.S. Rose, D.Q. Cavagnaro (CASC, 1). Vietnam: Cao Bang, 22°34.118'N, 105°52.537'E, 1048 m, 12-17.iv.2014, VN9, Cognato, Smith, Pham, ex FIT (MSUC, 1).

Diagnosis.

2.7-3.0 mm long (mean = 2.84 mm; n = 4); 2.5-3.0 × as long as wide. This species is distinguished by the short, steep declivity that is approximately 25% of total elytral length, armed with large tubercles on interstriae 1 and 3, interstriae 2 granulate on apical 1/3; posterolateral margins rounded; and declivital interstriae 1 and 2 setae in two confused rows (Table 1 ).

Similar species.

This species is a part of a challenging species group consisting of C. bodoanum , C. distinguendum , C. inarmatum , C. pelliculosum , and C. xeniolum (Table 1 ).

Distribution.

China (Fujian, Yunnan*), India* (Assam), Vietnam*.

Host plants.

This species has only been recorded from Pistacia ( Anacardiaceae ).

Remarks.

In his description Schedl lists the species as 2.3 mm long. The lectotype is 2.7 mm long. Xyleborus tenuigraphum was previously considered a synonym of X. fukiense by Beaver and Liu (2010) based on comparison between the lectotype, a specimen of C. fukiense compared to the holotype by Schedl, and an additional specimen with the same locality data as the homotype but identified by Schedl as X. tenuigraphum . Schedl clearly erred in his identification of his homotype specimen as the two species are distinguished by the characters listed above in the diagnosis and Table 1 .

Figures

Figure 45. Dorsal, lateral and declivital view of Cyclorhipidion pruinosum, 3.5 - 4.1 mm (A, B, I), C. sisyrnophorum, 3.3 - 4.0 mm (C, D, J), C. tenuigraphum, 2.7 - 3.0 mm (E, F, K), and C. truncaudinum holotype, 3.9 - 4.1 mm (G, H, L).