Euwallacea interjectus (Blandford, 1894)

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

Euwallacea interjectus (Blandford, 1894) Fig. 55G, H, L

Xyleborus interjectus Blandford, 1894c: 576.

Euwallacea interjectus (Blandford): Saha and Maiti 1984: 2.

Xyleborus pseudovalidus Eggers, 1925: 159. Synonymy: Schedl 1958a: 155.

Type material.

Holotype Xyleborus interjectus (NHMUK). Syntype Xyleborus pseudovalidus (NHMP).

New records.

China: Chongqing, Jinfo Mtn, Tian-Shang, Lv-Jia, ex Ficus sp. (RABC, 2). Hong Kong, Kadoorie Farm, vi.2017, J. Skelton (UFFE, 1). Jiangsu, Nanjing, Laoshan National Park, Bacai Road, 32.09156N, 118.583701E, 15.viii.2017, Cognato, Li, Gao, ex paper mulberry (MSUC, 5). Jiangxi, Jiu Jiang, 22.viii.2016, Lv-Jia, Tian-Shang, ex Liquidambar formosana (RABC, 1). India: Arunachal Pradesh, Etalin vicinity, 28°36'56"N, 95°53'21"E, 700 m, L. Dembický, 12-25.v.2012 (ZFMK, 53). Laos: Bolikhamxai, Ban Nape (8 km NE), 18°21'N, 105°08'E, 600 m, 1-18.v.2001, V. Kubáň (NHMB, 2). NE, Houa Phan, Ban Saluei, Phou Pan Mt., 20°12'N, 104°01'E, 1300-1900 m, 7.iv-25.v.2010, C. Holzschuh (NHMUK, 2); as previous except: 27.iv-1.vi.2011 (NHMUK, 12; RABC, 4). Kham Mouan, Ban Khun Ngeun, 18°07'N, 104°29'E, ~ 200 m, 24-29.iv.2001, Pacholátko (NHMB, 1). Oudomxai, Oudomxai, 17 km NE, 20°45'N, 102°09'E, ~ 1100 m, 1-9.v.2002, V. Kubáň (NHMB, 1). Vientiane, Ban Van Eue, 15.ii.1965, native collector (BPBM, 2).

Diagnosis.

3.5-3.9 mm long (mean = 3.78 mm; n = 5); 2.4-2.64 × as long as wide. This species is distinguished by the pronotum appearing subquadrate (type 3) from dorsal view; outer margin of protibiae round; declivital interstriae 1 granulate; declivital posterolateral margin carinate, never granulate; and moderately large size.

It can be further separated from the strongly morphologically similar species E. validus by the gradually sloped declivity; declivital strial punctures shallow giving the declivity a smooth appearance; and tubercles on interstriae 2 extending from base to apex.

Similar species.

Euwallacea funereus , E. validus , E. velatus .

Distribution.

From the Indian subcontinent, China and South Korea through Southeast Asia and Indonesia to the Philippines, New Guinea and Solomon Islands. Introduced to North America, Hawaii and South America (Argentina) ( Halbert 2011; Cognato et al. 2015; Gomez et al. 2018; Landi et al. 2019). Recorded in the study region from Bangladesh, China (Anhui, Chongqing*, Fujian, Gansu, Guangdong, Guizhou, Hainan, Hong Kong*, Hubei, Hunan, Jiangsu*, Jiangxi*, Sichuan, Yunnan, Xizang), India (Andaman Is, Arunachal Pradesh* Assam, Kerala, Madhya Pradesh, Maharashtra, Meghalaya, Sikkim, Tamil Nadu, Uttarakhand, West Bengal), Laos*, Myanmar, Nepal, Taiwan, Thailand, Vietnam.

Host plants.

Polyphagous ( Beeson 1930; Browne 1961b).

Figures

Figure 55. Dorsal, lateral and declivital view of Euwallacea funereus, 3.45 - 3.7 mm (A, B, I), E. geminus holotype, 2.7 - 2.8 mm (C, D, J), E. gravelyi, 4.6 - 5.7 mm (E, F, K), and E. interjectus, 3.5 - 3.9 mm (G, H, L).