Debus pumilus (Eggers, 1923)

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

Debus pumilus (Eggers, 1923) Fig. 48C, D, J

Xyleborus pumilus Eggers, 1923: 209.

Debus pumilus (Eggers): Hulcr and Cognato 2010a: 15.

Xyleborus cylindricus Eggers, 1927b: 94. Synonymy: Hulcr and Cognato 2010a: 15.

Xyleborus neocylindricus Schedl, 1942a: 196. Synonymy: Beaver 2011: 284.

Ips kelantanensis Browne, 1955: 345. Synonymy: Beaver 1995a: 199 (as synonym of X. cylindricus )

Xyleborus ipidia Schedl, 1972a: Synonymy: Hulcr and Cognato 2010a: 15.

Xyleborus planodeclivis Browne, 1974: 70. Synonymy: Schedl 1980: 122 (as synonym of Xyleborus ipidia ).

Type material.

Holotype Ips kelantanensis (NHMUK). Lectotype Xyleborus cylindricus (NMNH). Paratype Xyleborus ipidia (NHMW). Holotype Xyleborus neocylindricus (NHMW). Holotype Xyleborus planodeclivis (NHMUK). Lectotype Xyleborus pumilus (NMNH).

New records.

China: S Yunnan, 28 km NW Jinghong, vic. An Ma Xi Zhan (NNNR), 22°12'N, 100°38'E, 700 m, forest, EKL, 30.x.2008, A. Weigel (RABC, 1). India: Arunachal Pradesh, Etalin vicinity, 28°36'56"N, 95°53'21"E, 700 m, 12-25.v.2012, L. Dembický (ZFMK, 5); as previous except: ex FIT (ZFMK, 3). Laos: Vientiane, Ban Van Eue, 30.xi.1965, native collector (BPBM, 2). Vietnam: Ninh Binh, Cuc Phuong N.P., 20.34932, 105.59669, 5.iii.2018, 431 m, A.I. Cognato, S.M. Smith, VN 113a, ex Terminalia myriocarpa; large tree-fall trunk 8 cm diameter (MSUC, 3).

Diagnosis.

2.5-3.2 mm long (mean = 2.78 mm; n = 5); 3.25-3.57 × as long as wide. This species is distinguished by the elytral apex emarginate, never explanate, appearing flat and broad; declivital sulcus shallow; and small size.

Similar species.

Debus adusticollis , D. detritus .

Distribution.

Australia, China (Xizang, Yunnan*), Fiji, India (Andaman Is, Arunachal Pradesh*, Assam, West Bengal), Indonesia (Java, Maluku, Sumatra), Laos, East & West Malaysia, Myanmar, New Guinea, Philippines, Solomon Islands, Sri Lanka, Thailand, Vietnam.

Host plants.

Polyphagous. Browne (1961b) and Hulcr and Cognato (2013) suggest a strong preference for Moraceae , but the species has also been recorded from many other families.

Figures

Figure 48. Dorsal, lateral and declivital view of Debus emarginatus, 3.3 - 3.6 mm (A, B, I), D. pumilus, 2.5 - 3.2 mm (C, D, J), D. quadrispinus, 2.2 - 2.5 mm (E, F, K), and D. shoreae, 3.0 - 3.8 mm (G, H, L).