Euwallacea luctuosus (Eggers, 1939)

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 luctuosus (Eggers, 1939) Fig. 56C, D, J

Xyleborus luctuosus Eggers, 1939a: 13.

Euwallacea luctuosus (Eggers): Wood and Bright 1992: 691.

Type material.

Holotype (NHRS).

Diagnosis.

3.6 mm long (n = 1); 3.6 × as long as wide. This species is the most slender of the Euwallacea species. It can be further recognized by the posterolateral margins of declivity weakly costate; pronotum from dorsal view elongate, anterior margin rounded (type 7); and outer margin of protibiae obliquely triangular and bearing seven large denticles, their bases contiguous.

Similar species.

Euwallacea sibsagaricus , E. subalpinus , Heteroborips tristis .

Distribution.

Myanmar.

Host plants.

Unknown.

Figures

Figure 56. Dorsal, lateral and declivital view of Euwallacea kuroshio, 2.4 - 2.8 mm (A, B, I), E. luctuosus holotype, 3.6 mm (C, D, J), E. malloti, 2.4 - 3.0 mm (E, F, K), and E. minutus, 1.8 - 1.9 mm (G, H, L).