Dryoxylon onoharaense (Murayama, 1934)

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

Dryoxylon onoharaense (Murayama, 1934) Fig. 52

Xyleborus onoharaensis Murayama, 1934: 293.

Dryoxylon onoharaensum (Murayama): Bright and Rabaglia 1999: 333.

Dryoxylon onoharaensis (Murayama): Bright and Skidmore 2002: 95.

Dryoxylon onoharaense (Murayama): Alonso-Zarazaga and Lyal 2009: 100.

Type material.

Holotype (NMNH).

New records.

China: Guizhou, Guiyang, vi.2015, Y. Li, ex ethanol trap (UFFE, 1); as previous except: ix.2015 (UFFE, 1). Sichuan, Leibo, 800 m, 20.iv.1964, F. Huang, ex Cupressaceae 119 (NMNH, 1).

Diagnosis.

2.2-2.4 mm long (mean = 2.36 mm; n = 5); 3.14-3.43 × as long as wide. As described for the genus. This species is most easily distinguished by the anterior margin of pronotum in lateral view evenly arched, summit not elevated or evident; anterior margin of pronotum weakly emarginated at middle; declivity distinctly moderately deeply sulcate; declivital face and lateral margins unarmed; and comparatively few socketed denticles on the outer margin of the pro- (five), meso- (six) and metatibiae (five).

Similar species.

Small Cyclorhipidion spp.

Distribution.

China* (Guizhou, Sichuan), Japan, South Korea. Introduced and established in USA (Rabaglia and Bright 1999; Gomez et al. 2018a).

Host plants.

Abies ( Pinaceae ), Acer ( Sapindaceae ) ( Bright and Rabaglia 1999), Liriodendron tulipifera ( Magnoliaceae ) ( Atkinson 2018), Populus ( Salicaceae ) ( Coyle et al. 2005), Quercus ( Fagaceae ) ( Murayama 1934).

Remarks.

This species has been collected from both coniferous and angiosperm hosts.

Figures

Figure 52. Dorsal, lateral and declivital view of Dryoxylon onoharaense, 2.2 - 2.4 mm (A-C).