Ambrosiodmus rubricollis (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

Ambrosiodmus rubricollis (Eichhoff, 1876) Fig. 12C, D, F

Xyleborus rubricollis Eichhoff, 1876a: 202.

Ambrosiodmus rubricollis (Eichhoff): Wood 1989: 170.

Xyleborus taboensis Schedl, 1952b: 65. Synonymy: Wood 1989: 170.

Xyleborus strohmeyeri Schedl, 1975b: 457. Synonymy: Wood 1989: 170.

Type material.

Holotype (IRSNB). Not examined.

New records.

China: Chongqing, Simian mtn, 7.v.2015, Tian-Shang, Lv-Jia (RABC, 1); as previous except: Jinfo mtn, 10.v.2015 (RABC, 2). Guangdong, Lantau Is., Shi Bi pool, hardwood plantation, 4.vi.2004, Li, Z-R. (RABC, 1). Guangxi, Jiangidi, 25°55.6'N, 110°14.8'E, 365 m, terraced fields surrounded with shrubs and bamboo forest, 12.iv.2013, M. Ficáček, J. Hájek, J. Růžička (MNHP, 1). Hong Kong Is., Shek O, secondary broadleaf trees & bamboo forest, 24.viii.2004 (RABC, 1); as previous except: Tai Po Kau, vi.2017, J. Skelton (MSUC, 1). Jiangxi, Gan Zhou, 7.vii.2016, Lv-Jia & Lai-S-C, ex Senna surattensis (RABC, 1); as previous except: Jinggang Shan, Jingzhushan Zhufeng, 26°31.0'N, 114°05.9'E, 640 m, stream valley, 25.iv.2011, M. Ficáček, J. Hájek (MNHP, 1); as previous except: 26°32.0'N, 114°08.6'E, 805 m, forested slopes of river valley, 29.iv.2011 (RABC, 1). Laos: Vientiane, Ban Van Eue, 15.xii.1965, native collector (BPBM, 1). Vietnam: Cao Bang, 22°33.118'N, 105°52.537'E, 1048 m, 12-17.vi.2014, VN9, Cognato, Smith, Pham, FIT (MSUC, 5). Thua Thien-Hue, Bach Ma N.P., 16.18902, 107.8498, 1193 m, 15.ii.2017, VN54, A.I. Cognato, T.A. Hoang, ex 1-4 cm diameter branch (MSUC, 1). Tuyen Quang, Doi Can Tuyen Quang, 21.72740, 105.22742, 15.iv.2015, R.J. Rabaglia, funnel trap (RJRC, 1). Yen Bai, Tan Huong, 21.82410, 104.89651, 15.iv.2015, funnel trap (RJRC, 1).

Diagnosis.

2.5-2.8 mm long (mean = 2.7 mm; n = 7); 2.45-2.55 × as long as wide. This species is distinguished by the declivital interstriae with uniformly sized and spaced granules from base to apex; declivital interstriae slightly elevated and bearing erect hair-like setae, setae located ventrad of each granule; declivital surface shiny, and light red-brown color.

Similar species.

Ambrosiodmus brunneipes , A. conspectus .

Distribution.

China (Anhui, Beijing, Chongqing*, Fujian, Guangdong*, Guangxi*, Guizhou, Hebei, Heilongjiang, Hong Kong*, Hunan, Jiangxi*, Shaanxi, Shandong, Sichuan, Xizang, Yunnan, Zhejiang), Japan, South & North Korea, Laos*, West Malaysia, Taiwan, Thailand, Vietnam. Introduced to Australia ( Wood and Bright 1992), Italy ( Faccoli et al. 2009), North America ( Bright 1968), and South America ( Wood 2007).

Host plants.

A polyphagous species ( Faccoli et al. 2009), which usually attacks smaller stems ( Browne 1961b).

Figures

Figure 12. Dorsal, lateral and declivital view of Ambrosiodmus minor, 3.5 - 4.0 mm (A, B, E), and A. rubricollis, 2.5 - 2.8 mm (C, D, F).