Xyleborinus speciosus (Schedl, 1975)

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

Xyleborinus speciosus (Schedl, 1975) Fig. 85G, H, L

Xyleborus speciosus Schedl, 1975b: 457.

Xyleborinus speciosus (Schedl): Wood and Bright 1992: 816.

Type material.

Holotype (NHMW).

New records.

China: S. Yunnan, Xishuangbanna, 37 km NW Jinghong, vic. Guo Men Shan, 22°14.48'N, 100°36.22'E, 1080 m, 28.vi.2008, L. Meng (RABC, 1). Thailand: Chiang Mai, Doi Pui, 1400 m, EtOH trap, various dates from 6.ix-12.xi.2004, 10-31.x.2005, 8-12.v.2006, W. Puranasakul (RABC, 7).

Diagnosis.

2.6-2.7 mm long (mean = 2.65 mm; n = 3); 2.89-3.0 × as long as wide. This species is distinguished by the posterior margin of elytra broadly rounded; declivital face with interstriae 1 and 2 unarmed by tubercles; declivital face weakly sulcate; large body size; lateral declivital margins elevated along interstriae 3, bearing three pairs of short, narrow, sharply pointed spines, spines equal in size; sulcate area of declivity smooth, shiny; interstriae impunctate; and elongate body form.

Similar species.

Xyleborinus artestriatus , X. ephialtodes , X. echinopterus , X. octiesdentatus , X. schaufussi , X. spinipennis .

Distribution.

China* (Yunnan), India (West Bengal), Thailand*.

Host plants.

Recorded from Juglans ( Juglandaceae ), Litsea ( Lauraceae ), Prunus ( Rosaceae ) and Symplocos ( Symplocaceae ) ( Saha and Maiti 1996, as Xyleborinus subspinosus (Eggers)).

Remarks.

This species appears to have been misidentified by Saha and Maiti (1996) and Maiti and Saha (2004) as Xyleborinus subspinosus , a synonym of X. saxesenii (see above). It was misidentified by Beaver et al. (2014) as Xyleborinus spinipennis (Eggers).

Figures

Figure 85. Dorsal, lateral and declivital view of Xyleborinus saxesenii, 2.3 - 2.5 mm (A, B, I), X. schaufussi, 2.5 - 3.1 mm (C, D, J), X. sculptilis paratype, 2.1 - 2.25 mm (E, F, K), and X. speciosus holotype, 2.6 - 2.7 mm (G, H, L).