Xyleborus mysticulus Cognato & Smith, 2019

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

Xyleborus mysticulus Cognato & Smith, 2019 Fig. 90A, B, I

Xyleborus mysticulus Cognato & Smith, 2019 (in Cognato et al. 2019): 1281.

Type material.

Holotype (MSUC), paratypes (MSUC, 9; NHMUK, 2; NMNH, 2).

New records.

Vietnam: Lao Cai, Nam Tha, 22.01218, 104.37685, 28.v.2015, Pham Thu, ex funnel trap (RJRC, 1); as previous except: Hoang Lien N.P., 22.35N, 103.77E, 1500 m, 21.v.2019, VN152, S.M. Smith, A.I. Cognato, ex FIT (MSUC, 1).

Diagnosis.

2.2-2.5 mm long (mean = 2.38 mm; n = 5); 3.14-3.57 × as long as wide. This species is distinguished by declivital interstriae 1 laterally broadened from base to declivital midpoint then narrowing towards apex; discal interstriae 2 × the width of discal striae; discal strial punctures 3 × larger than interstrial punctures; declivital interstriae bear both denticles and granules, denticles on low tumescences giving the declivity a rugged sculptured appearance; declivital striae not impressed; declivital striae and interstriae difficult to distinguish; and declivital posterolateral margin carinate to interstriae 7.

Similar species.

Xyleborus glabratus , X. insidiosus .

Distribution.

Taiwan, Vietnam.

Host plants.

Machilus ( Lauraceae ) and unidentified Lauraceae ( Cognato et al. 2019).

Figures

Figure 90. Dorsal, lateral and declivital view of Xyleborus mysticulus holotype, 2.2 - 2.5 mm (A, B, I), X. opacus paratype, 2.7 mm, 2.2 - 2.5 mm (C, D, J), X. perforans, 2.3 - 2.6 mm (E, F, K), and X. pfeilii, 2.9 - 3.2 mm (G, H, L).