Xylosandrus amputatus (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 amputatus (Blandford, 1894) Fig. 92C, D, J

Xyleborus amputatus Blandford, 1894c: 575.

Amasa amputatus [sic] (Blandford): Wood and Bright 1992: 682.

Xylosandrus amputatus (Blandford): Dole and Cognato 2010: 473.

Xyleborus melli Schedl, 1938: 463. Synonymy: Beaver 2010: 55.

Type material.

Holotype Xyleborus amputatus (NHMUK). Lectotype Xyleborus melli (NHMW).

New records.

Cambodia: Sihanouk, Sihanoukville (Rosan Hill), 9-10.ix.2016, 50 m, J.B. Heppner (FSCA, 1). China: Guangdong, W of Qixing, Heishiding Nature Reserve, 23°27.9'N, 114°16.0'E, 190 m, forested stream, valley, at light, 1-3.v.2011, M. Ficáček, J. Hájek (MNHP, 1). Shanghai, Dongchuan, vii-viii.2017, Gao, ex trap w/ querciverol (MSUC, 1). Vietnam: Cao Bang, 22°34.118'N, 105°52.537'E, 1048 m, 12-17.iv.2014, VN9, Cognato, Smith, Pham, ex FIT (MSUC, 4). Dong Nai, Cat Tien N.P., 11.46050, 107.37375, 379 m, 22-24.ii.2017, VN75, A.I. Cognato, T.A. Hoang, ex FIT (MSUC, 1). NE region, Lang Son, Mau Son Nat. Park, 13-14.vi.2016, at lights, 21°51.001'N, 106°55.074'E, G.S. Powell (MSUC, 3).

Diagnosis.

2.8 mm long (mean = 2.8 mm; n = 5); 2.15-2.33 × as long as wide. This species is distinguished by its moderate size; upper part of eye smaller than lower part; elytral disc weakly ascending apically, longer than declivity; declivital face steep, abruptly separated from disc; elytra truncate; posterolateral margins of elytra carinate to suture forming a circumdeclivital carina; declivital face flat, coarsely shagreened, dull; declivity with four punctate, glabrous, straight striae visible; strial punctures large; interstriae glabrous, punctate; posterolateral margin smooth, not granulate; pronotum as long as wide, from dorsal view rounded (type 1) and lateral view basic (type 0), summit at midpoint, basal 1/2 shiny, densely punctate; and broad, dense mycangial tuft on the pronotal base.

Similar species.

Amasa spp., Xylosandrus bellinsulanus , X. mancus .

Distribution.

Cambodia*, China (Fujian, Guangdong*, Hunan, Shanghai*, Sichuan), Japan, Korea, Taiwan, Vietnam*. Imported and established in USA ( Cognato et al. 2011; Gomez et al. 2018a).

Host plants.

Recorded from Acer ( Aceraceae ), Cinnamomum , Machilus ( Lauraceae ), Pelargonium ( Geraniaceae ), and Ziziphus ( Rhamnaceae ) ( Dole and Cognato 2010).

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).