Eccoptopterus limbus Sampson, 1911

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

Eccoptopterus limbus Sampson, 1911 Fig. 53A, B, E

Eccoptopterus limbus Sampson, 1911: 381.

Xyleborus auratus Eggers, 1923: 193. Synonymy: Wood and Bright 1992: 821.

Xyleborus squamulosus Eggers, 1923: 193. Synonymy: Eggers 1927a: 407.

Xyleborus squamulosus duplicatus Eggers, 1923: 193. Synonymy: Browne 1955: 351; Wood 1989: 172.

Type material.

Holotype Eccoptopterus limbus (NHMUK). Lectotype Xyleborus auratus (NMNH). Lectotype Xyleborus squamulosus (NMNH). Lectotype Xyleborus squamulosus duplicatus (NMNH).

Diagnosis.

3.5-4.2 mm long (mean = 3.73 mm; n = 5); 2.1-2.3 × as long as wide. This species is distinguished by the presence of more than three spines on each elytral margin, declivital armature consists of two large spines closest to suture on declivital summit and many smaller, uniformly sized denticles on declivital margin.

Similar species.

Eccoptopterus spinosus .

Distribution.

China (Yunnan), Indonesia (Java, Sumatra, Sunda Is), East & West Malaysia, New Guinea, Thailand.

Host plants.

Polyphagous ( Browne 1961b).

Remarks.

Elytral vestiture of this species is quite variable. In Asian specimens the declivity is covered with dense flattened scales while specimens from Papua New Guinea are covered by long setae. The shape, density and color of the scales are quite variable ( Hulcr and Cognato 2013).

Figures

Figure 53. Dorsal, lateral and declivital view of Eccoptopterus limbus, 3.5 - 4.2 mm (A, B, E), and E. spinosus, 2.5 - 3.7 mm (C, D, F).