Xyleborus festivus Eichhoff, 1876

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

Xyleborus festivus Eichhoff, 1876 Fig. 89A, B, I

Xyleborus festivus Eichhoff, 1876a: 202.

Xyleborus pinicola Eggers, 1930: 206. Synonymy: Smith et al. 2018b: 397.

Xyleborus detectus Schedl, 1975a: 458. Synonymy: Smith et al. 2018b: 397.

Xyleborus pinivorus Browne, 1980a: 374. Synonymy: Smith et al. 2018b: 397.

Type material.

Holotype Xyleborus festivus (UHZM). Holotype Xyleborus detectus (NHMW). Holotype Xyleborus pinicola (FRI), paratypes (NHMW, 1; NMNH, 2). Holotype Xyleborus pinivorus (NHMUK).

New records.

China: Fujian, Nanjing, Zhangzhou, 600 m, 3.iii.1962, Fusheng Huang, ex Pinus massoniana (NMNH, 5). Guizhou, Guiyang, Huaxi, 6.xi.2015, Y. Li, ex Pinus massoniana (UFFE, 1). Yunnan, sawmill near Ning’er, 19.vi.2010, Zhou, X-D, Pinus kesiya sawmill log (RABC, 1). Taiwan: Huisin Forest, 23.ix.2015, A. Black, J. Skelton, ex Pinus taiwanensis (UFFE, 1).

Diagnosis.

3.6-3.9 mm long (mean = 3.75 mm; n = 5); 2.85-3.17 × as long as wide. This species is distinguished by the declivity steep, appearing convex from lateral view; declivital interstriae 1-3 laterally broadened from base to declivital midpoint then narrowing towards apex; large body size; declivital posterolateral margin costate extending to interstriae 7; declivital interstriae 1 and 3 convex, interstriae 2 impressed; declivital striae feebly impressed; declivital interstriae 1 armed by 3-7 large denticles, interstriae 2 armed with denticles or unarmed (highly variable), declivital interstriae 3 armed by 4-9 large denticles, denticles on interstriae 1 and 3 uniform in height; declivital strial punctures moderately sized, fine, uniseriate, never confused.

Similar species.

Xyleborus affinis , X. cognatus , X. ferrugineus , X. perforans , X. pfeilii , X. volvulus .

Distribution.

China (Fujian, Guangdong, Guangxi, Guizhou, Yunnan), Japan, Myanmar, Taiwan, Thailand, Vietnam.

Host plants.

This species is unusual amongst Xyleborus in attacking only species of Pinus ( Pinaceae ) ( Wood and Bright 1992) including P. kesiya , P. massoniana , P. yunnanensis and P. taiwanensis ( Li et al. 2020).

Remarks.

The Chinese host range and fungal associates of this species were recently reported ( Li et al. 2020)

Figures

Figure 89. Dorsal, lateral and declivital view of Xyleborus festivus, 3.6 - 3.9 mm (A, B, I), X. glabratus, 2.2 - 2.5 mm (C, D, J), X. insidiosus holotype (E, F, K), and X. muticus holotype, 3.0 - 3.1 mm (G, H, L).