Xylosandrus morigerus (Blandford, 1894)

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 morigerus (Blandford, 1894) Fig. 96G, H, L

Xyleborus morigerus Blandford, 1894a: 264.

Xylosandrus morigerus (Blandford): Reitter 1913: 84.

Xyleborus coffeae Wurth, 1908: 64. Synonymy: Strohmeyer 1910: 86; Schedl 1951b: 136.

Xyleborus difficilis Eggers, 1923: 174. Synonymy: Bright and Skidmore 1997: 4, 169.

Xyleborus luzonicus Eggers, 1923: 174. Synonymy: Wood 1974: 287.

Xyleborus abruptoides Schedl, 1955a: 298. Synonymy: Beaver 1995b: 17.

Type material.

Holotype Xyleborus abruptoides (BPBM). Lectotype Xyleborus difficilis (NMNH). Syntypes Xylosandrus morigerus (NHMUK).

New records.

China: S Yunnan, Xishuangbanna, 20 km NW Jinghong, vic. Man Dian (NNNR), 22°07.80'N, 100°40.0'E, 730 m, forest, 6.vi.2008, A. Weigel (RABC, 1).

Diagnosis.

1.4-2.0 mm long (mean = 1.82 mm; n = 5); 2.0-2.33 × as long as wide. This species is distinguished by its small size; disc strongly convex, much shorter than declivity; posterolateral margins of elytra carinate to interstriae 7; declivital face with six punctate striae; declivital striae setose, setae minute, semi-recumbent, hair-like; interstriae granulate, uniseriate with erect hair-like setae longer than the width of one interstria; pronotum wider than long, from dorsal view rounded (type 1) and lateral view rounded (type 1), summit at midpoint, basal half smooth, shiny, sparsely minutely punctate; and sparse mycangial tuft on the pronotal base.

Similar species.

Xylosandrus adherescens , X. compactus , X. derupteterminatus , X. mesuae .

Distribution.

Circumtropical. Within the study region recorded from China* (Yunnan), India (Tamil Nadu, West Bengal), Laos, Myanmar, Taiwan, Thailand, Vietnam. Introduced to Europe ( Kirkendall and Faccoli 2010) and South and Central America ( Wood 1982, 2007).

Host plants.

Strongly polyphagous ( Dole and Cognato 2010).

Remarks.

The biology has been studied by Browne (1961a) and Kalshoven (1961). These and other studies are reviewed by Schedl (1963a) and Le Pelley (1968). The species has some economic importance as a pest of coffee ( Kalshoven 1961; Le Pelley 1968) and of other crop trees.

Figures

Figure 96. Dorsal, lateral and declivital view of Xylosandrus mancus, 3.2 - 3.6 mm (A, B, I), X. mesuae, 1.3 - 1.7 mm (C, D, J), X. metagermanus holotype, 1.8 - 2.3 mm (E, F, K), and X. morigerus, 1.4 - 2.0 mm (G H, L).