Cnestus testudo (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

Cnestus testudo (Eggers, 1939) Fig. 34E, F, I

Xyleborus testudo Eggers, 1939b: 116.

Xylosandrus testudo (Eggers): Wood and Bright 1992: 801.

Cnestus testudo (Eggers): Dole and Cognato 2010: 532.

Type material.

Lectotype (NMNH), paratypes (TARI, 3).

Diagnosis.

4.2-4.4 mm long (mean = 4.31 mm; n = 5); 1.54-1.62 × as long as wide. This species is distinguished by the presence of a mesonotal mycangial tuft on the pronotal base; elytral disc short, 3 × scutellum length; declivity obliquely truncate; pronotum type 1 when viewed dorsally; antennal club type 2, with two sutures visible on posterior face; antennal funicle 4-segmented; protibiae distinctly triangular; procoxae narrowly separated; declivital posterolateral margin weakly carinate from apex to declivital base along interstriae 7; declivital interstriae granulate, setose with recumbent ground vestiture and a median row of long erect hair-like setae; declivital striae 1 impressed; discal punctures dense, confused; and uniformly pitch black or piceous colored body with brown legs and antennae.

Similar species.

Cnestus ater , C. gravidus , C. improcerus , C. mutilatus .

Distribution.

China (Yunnan), Laos, Taiwan, Thailand, Vietnam.

Host plants.

Unknown.

Figures

Figure 34. Dorsal, lateral and declivital view of Cnestus quadrispinosus paratype, 3.45 - 4.5 mm (A, B, G), C. suturalis paratype, 2.8 mm (C, D, H), and C. testudo, 4.2 - 4.4 mm (E, F, I).