Xyleborinus perpusillus (Eggers, 1927)

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 perpusillus (Eggers, 1927) Fig. 84G, H, L

Xyleborus perpusillus Eggers, 1927a: 404.

Xyleborinus perpusillus (Eggers): Hulcr 2010: 115.

Xyleborus perminutissimus Schedl, 1934b: 90. Synonymy: Hulcr 2010: 116.

Xyleborus angustatulus Schedl, 1942c: 42. Synonymy: Kalshoven 1959a: 152.

Type material.

Paratype Xyleborus perpusillus (NMNH).

Diagnosis.

1.6-1.9 mm long (mean = 1.76 mm; n = 5); 2.67-3.17 × as long as wide. This species is distinguished by the entire length of interstriae 2 unarmed by tubercles; posterolateral margin of elytra rounded, unarmed; declivital interstriae flat, interstriae 2 not impressed; and denticles on interstriae 1 and 3 small.

This species is very similar to X. huifenyinae and is distinguished by the shiny declivity, posterolateral declivity margin rounded and unarmed and smaller denticles on interstriae 1 and 3.

Similar species.

Xyleborinus exiguus , X. huifenyinae , X. tritus .

Distribution.

Indonesia (Java, Sumatra), East & West Malaysia, New Guinea, Thailand.

Host plants.

Recorded from small trees in several families, including palms ( Arecaceae ) ( Beaver et al. 2014).

Figures

Figure 84. Dorsal, lateral and declivital view of Xyleborinus huifenyinae holotype, 1.7 mm (A, B, I), X. jianghuasuni holotype, 1.8 mm (C, D, J), X. octiesdentatus, 2.5 - 2.65 mm (E, F, K), and X. perpusillus, 1.6 - 1.9 mm (G, H, L).