Debus shoreae (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

Debus shoreae (Stebbing, 1907) Fig. 48G, H, L

Tomicus shoreae Stebbing, 1907: 39.

Xyleborus shoreae (Stebbing): Hulcr 2010: 109 (as synonym of Debus fallax (Eichhoff)).

Debus shoreae (Stebbing): Beaver et al. 2014: 44.

Tomicus assamensis Stebbing, 1909: 17. Synonymy: Beeson 1930: 259.

Type material.

Holotype Tomicus shoreae (FRI).

New records.

China: Sichuan, Leibo, 800 m, 20.iv.1964, Fusheng Huang, ex fir (NMNH, 1). India: Arunachal Pradesh, Etalin vicinity, 28°36'56"N, 95°53'21"E, 700 m, 12-25.v.2012, L. Dembický (ZFMK, 3). Vietnam: Cao Bang, 22°36.3'N, 105°52.6'E, 1435-1601 m, 13-17.iv.2014, VN16, Cognato, Smith, Pham, ex FIT (MSUC, 4).

Diagnosis.

3.0-3.8 mm long (mean = 3.34 mm; n = 5); 2.92- 3.17 × as long as wide. This species is distinguished by the posterolateral extensions of elytra short, less than the width of apical emargination and declivity shallowly excavated; and declivity impunctate except for a single row of punctures running from the upper margin to the inner margin of the second declivital spine and thence to the apical emargination.

This species is very similar to D. emarginatus and is distinguished by the punctation of the declivity.

Similar species.

Debus emarginatus , D. quadrispinus .

Distribution.

China (Guangxi, Sichuan*), India (Arunachal Pradesh*, Assam, Uttarakhand, Uttar Pradesh, West Bengal), Indonesia (Java, Sumatra), Laos, East Malaysia, Myanmar, Nepal, New Guinea, Thailand, Vietnam*.

Host plants.

Polyphagous, possibly with a preference for Dipterocarpaceae ( Beaver et al. 2014).

Remarks.

Hulcr (2010) placed D. shoreae in synonymy with D. quadrispinus (as D. fallax ) based on an illustration by Maiti and Saha (2004) as examination of type specimens was not possible. Maiti and Saha described the species as very morphologically similar to D. quadrispinus (as D. fallax ). The illustration clearly shows the diagnostic declivital puncturation and other features as described above which are distinct from D. quadrispinus . Two specimens of D. shoreae collected from the type locality determined by C.F.C. Beeson (MSUC) were also examined and are clearly distinct from those of D. quadrispinus .

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).