Xyleborinus octiesdentatus (Murayama, 1931)

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

Xyleborinus octiesdentatus (Murayama, 1931) Fig. 84E, F, K

Xyleborus octiesdentatus Murayama, 1931: 46.

Xyleborinus octiesdentatus (Murayama): Beaver et al. 2008: 234.

Type material.

Syntypes (NMNH, 4).

New records.

Vietnam: Cao Bang, 22°33.9981'N, 105°52.591'E, 1051 m, 12-17.iv.2014, VN12, Cognato, Smith, Pham (MSUC, 1).

Diagnosis.

2.50-2.65 mm long (mean = 2.55 mm; n = 5); 2.79-3.13 × as long as wide. This species is distinguished by the posterior margin of elytra broadly rounded; declivital face with interstriae 1 and 2 unarmed by tubercles; declivital face moderately sulcate; large body size; lateral declivital margins elevated, bearing 4-6 pairs of long, narrow, sharply pointed spines (often asymmetric), increasing in length from base to apex; sulcate area of declivity smooth, shiny; and elongate body form.

Similar species.

Xyleborinus artestriatus , X. echinopterus , X. ephialtodes , X. schaufussi , X. speciosus , X. spinipennis .

Distribution.

China (Sichuan), Japan, South Korea, Vietnam*. Imported and established in USA ( Rabaglia et al. 2010; Gomez et al. 2018a).

Host plants.

Recorded from Carpinus ( Betulaceae ), Illicium ( Illiciaceae ), Cleyera and Eurya ( Theaceae ) ( Wood and Bright 1992).

Figures

Figure 84. Dorsal, lateral and declivital view of Xyleborinus huifenyinae holotype, 1.7 mm (A, B, I), X. jianghuasuni holotype, 1.8 mm (C, D, J), X. octiesdentatus, 2.5 - 2.65 mm (E, F, K), and X. perpusillus, 1.6 - 1.9 mm (G, H, L).