Xylosandrus mesuae (Eggers, 1930)

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 mesuae (Eggers, 1930) Fig. 96C, D, J

Xyleborus mesuae Eggers, 1930: 182.

Xylosandrus mesuae (Eggers): Browne 1963: 55.

Type material.

Holotype (FRI), paratype (NMNH, 1).

New records.

China: Hong Kong, Tai Po Kau, vi.2017, J. Skelton, ex Machilus (MSUC, 3). India: Arunachal Pradesh, Etalin vicinity, 28°36'56"N, 95°53'21"E, 700 m, L. Dembický, 12-25.v.2012 (ZFMK, 1). Taiwan: Yilan, Toucheng Township, 8.vii.2017, C.-S. Lin (MSUC, 1). Thailand: Chumporn sic [= Chumphon Province], Durian Orchard, 1.ii.2010, Wisut [Sittichaya], EtOH trap (MSUC, 1). Mae Hong Son, Pang Mapha, Sop Pong, 605 m, 20-24.vii.2009, J.B. Heppner (FSCA, 1).

Diagnosis.

1.3-1.7 mm long (mean = 1.5 mm; n = 5); 2.29-2.6 × as long as wide. This species is distinguished by its minute size; elytral disc gradually curving toward declivity, elytra rounded; elytral disc convex, disc as long as declivity; posterolateral margins of elytra carinate to interstriae 7; declivital face with six punctate striae; declivital striae setose, setae semi-recumbent hair-like, less than the width of one interstria; interstriae granulate, uniseriate with erect hair-like setae longer than the width of one interstria; pronotum wider than long, 0.82-0.90 × as long as wide, from dorsal view rounded (type 1) and lateral view rounded (type 0), summit at midpoint, basal 1/2 smooth, shiny, sparsely minutely punctate; and sparse mycangial tuft on the pronotal base.

Similar species.

Xylosandrus adherescens , X. compactus , X. derupteterminatus , X. morigerus .

Distribution.

China* (Hong Kong*), India (Arunachal Pradesh, Uttarakhand, West Bengal), Sri Lanka, Taiwan, Thailand.

Host plants.

Recorded from Mesua ( Calophyllaceae ), Dipterocarpus , Shorea ( Dipterocarpaceae ), Macaranga ( Euphorbiaceae ), Osbeckia ( Melastomataceae ) ( Dole and Cognato 2010), and Machilus ( Lauraceae ).

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).