Tricosa metacuneolus (Eggers, 1940)

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

Tricosa metacuneolus (Eggers, 1940) Fig. 77G, H, L

Xyleborus metacuneolus Eggers, 1940: 150.

Tricosa metacuneola [sic] (Eggers): Cognato et al. 2020a: 550.

Xyleborus kaimochii Nobuchi, 1981a: 143. Synonymy: Smith et al. 2018b: 397.

Type material.

Paratype Xyleborus metacuneolus (NMNH).

Diagnosis.

2.4-2.5 mm long (mean = 2.46 mm; n = 5); 2.67-2.78 × as long as wide. This species is distinguished by the elytra gently attenuate on apical 30%; declivital interstriae uniseriate granulate, granules numerous, spaced by a distance of less than three granule widths; and declivital striae and interstriae densely setose, strial setae 1/2 as long as those of interstriae.

Similar species.

Coptodryas mus , Fraudatrix cuneiformis .

Distribution.

Brunei, Indonesia (Java, Sulawesi), Japan, East & West Malaysia, New Guinea, Philippines, Sri Lanka, Taiwan, Thailand.

Host plants.

Probably polyphagous. Recorded from Buchanania , Mangifera ( Anacardiaceae ), Castanopsis ( Fagaceae ), Swietenia ( Meliaceae ), and Gymnacranthera ( Myristicaceae ) ( Nobuchi 1981a; Beaver and Liu 2010; Cognato et al. 2020a).

Figures

Figure 77. Dorsal, lateral and declivital view of Tricosa cattienensis holotype, 2.7 - 3.1 mm (A, B, I), T. indochinensis holotype, 3.2 - 3.4 mm (C, D, J), T. jacula holotype, 3.2 mm (E, F, K), and T. metacuneolus paratype, 2.4 - 2.5 mm (G, H, L).