Ambrosiodmus minor (Stebbing, 1907)

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 minor (Stebbing, 1907) Fig. 12A, B, E

Phloeosinus minor Stebbing, 1907: 37.

Dryocoetes minor (Stebbing): Stebbing 1914: 549.

Xyleborus minor (Stebbing): Beeson 1930: 70.

Ambrosiodmus minor (Stebbing): Wood and Bright 1992: 676.

Xyleborus crassus Hagedorn, 1910a: 8. Synonymy: Schedl 1962a: 208.

Type material.

Holotype Phloeosinus minor (FRI).

New records.

China: Chongqing, NanShan, 15.viii.2015, J-G Wang, Lv-Jia, Tian-Shang (RABC, 3). Jiangsu, Nanjing, Zijinshan, 10.viii.2017, Y. Li, ex unknown log (MSUC, 1). Jiangxi, Jinggang Shan Mts, Jingzhushan Zhufeng, forested slopes of river valley, 26°32.0'N, 114°08.6'E, 805 m, 29.iv.2011, M. Ficáček, J. Hájek (MNHP, 1). Zhejiang, Tianmu Shan, pass 25 km NW Linan, 620-820 m, 30°25'40"N, 119°35'30"E, creek valley with bamboo and mixed forest, litter, sifted, 16.vi.2007, M. Schülke (MFNB, 1). Laos: Louangnantha, Nantha to Muang Sing, 21°09'N, 101°19'E, 900-1200 m, 5-31.v.1997, V. Kubáň (NHMB, 3). NE, Hua Phan, Ban Saluei, Phou Pan (Mt.), 20°12'N, 104°01'E, 1300-1900 m, 7.iv-25.v.2010, C. Holzschuh (NHMUK, 2); NW, 5 km SW Muang Sing, Chiang Tung (Stupa) GH, 750 m, 26.iii-5.iv.2010, S. Murzin (IRSNB, 4); N, 10 km N Luang Prabang, Mekon [sic] riv., 240 km N. Vientiane, hill county [sic], sparse, settled primary vegetation, ix.1992, I. Somay (RABC, 1). Taiwan: [Pingtung Co.], Henchun, Kuraru [Kenting Forestry Park], 250 m, 3.iv.1965, C.M. Yoshimoto (BPBM, 1). Vietnam: Hoa Binh, 1929, A. DeCooman (MNHN, 1); as previous except: 1934 (MNHN, 1). Lao Cai, Nam Tha, 22.01218, 104.37685, 9.v.2015, Pham Thu, ex funnel trap (RJRC, 1).

Diagnosis.

3.5-4.0 mm long (mean = 3.74 mm; n = 5); 2.19-2.53 × as long as wide. This species is distinguished by each declivital interstriae variously tuberculate, never granulate; and red-brown color.

This species strongly resembles A. lewisi from which it can usually be distinguished by the smaller size and tubercles on interstriae 2 not distinctly larger than those of other interstriae.

Similar species.

Ambrosiodmus lewisi .

Distribution.

Bangladesh, Bhutan, China (Chongqing, Guangxi, Jiangsu, Jiangxi*, Sichuan, Yunnan, Zhejiang), India (Assam, Meghalaya, Madhya Pradesh, Maharashtra, Uttarakhand, Uttar Pradesh, West Bengal), Laos*, East Malaysia, Myanmar, Nepal, Taiwan, Thailand, Vietnam. Established in the USA ( Rabaglia and Okins 2011; Gomez et al. 2018a).

Host plants.

Polyphagous ( Beeson 1930, 1961; Ohno 1990; Maiti and Saha 2004; Lin et al. 2019).

Remarks.

Wood and Bright (1992) considered the species as being described by Stebbing in 1909 ( Stebbing 1909: 20) rather than in 1907 despite listing this publication under the taxonomy section for the species. This error undoubtedly occurred because Stebbing classified Phloeosinus minor as a new species in both publications. However, in 1909 he states "this amplifies the description given of this insect in [1907]" at the end of the species description. This error has been unknowingly perpetuated throughout the literature published since 1992.

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).