Xylosandrus adherescens Schedl, 1971

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

Xylosandrus adherescens Schedl, 1971 Fig. 92A, B, I

Xylosandrus adherescens Schedl, 1971b: 375.

Type material.

Holotype (NHMW).

New records.

Vietnam: Dong Nai, Cat Tien N.P., 11.42854, 107.42544, 148 m, 23.ii.2017, VN98, A.I. Cognato, T.A. Hoang, ex 5 cm diameter (MSUC, 2).

Diagnosis.

2.0 mm long (n = 3); 2.0 × as long as wide. This species is distinguished by its small size; elytral disc flat, gradually curving toward declivity, elytra rounded; posterolateral margins of elytra carinate to interstriae 7; declivital face with six punctate striae, striae setose, setae semi-recumbent and equal to the width of an interstria; interstriae denticulate-granulate, uniseriate with erect hair-like setae longer than the width of two interstriae; pronotum as long as wide, from dorsal view rounded (type 1) and lateral view basic (type 0), summit at midpoint, basal 1/2 smooth, shiny, sparsely minutely punctate; and sparse mycangial tuft on the pronotal base.

Similar species.

Xylosandrus compactus , X. derupteterminatus , X. mesuae , X. morigerus .

Distribution.

Vietnam.

Host plants.

Unknown.

Remarks.

The gallery of this species was flat and a cave type. It was excavated against the grain of the wood (AIC, pers. obs.).

Figures

Figure 92. Dorsal, lateral and declivital view of Xylosandrus adherescens, 2.0 mm (A, B, I), X. amputatus, 2.8 mm (C, D, J), X. beesoni, 2.2 - 2.7 mm (E, F, K), and X. bellinsulanus holotype, 3.9 mm (G, H, L).