Arixyleborus hirsutulus Schedl, 1969

Sittichaya, Wisut, Smith, Sarah M. & Beaver, Roger A., 2019, Ten newly recorded species of xyleborine ambrosia beetles (Coleoptera, Curculionidae, Scolytinae, Xyleborini) from Thailand, ZooKeys 862, pp. 109-127 : 115-117

Arixyleborus hirsutulus Schedl, 1969 Fig. 5 A–E

Arixyleborus hirsutulus Schedl, 1969: 212.

Diagnosis.

Small, 2.0 mm (N = 1) long; 2.27 times longer than wide; pronotum shining, elytra densely setose, dark brown to black in color; pronotum from dorsal view with sides parallel, weakly elongate and rounded frontally (type 7; Hulcr et al. 2007), from lateral view elongate with low summit (type 7; Hulcr et al. 2007); elytra 1.25 times longer than pronotum, disc weakly convex, apical three-fourths rugose, striae and interstriae covered with small equally size granules, never forming strial furrows and interstrial ridges, elytra densely covered with setae, setae increasing in density towards apex, posterolateral carina oblique, granulate.

Material examined.

THAILAND, Hala-Bala Wildlife Sanctuary, Narathiwat Province, lowland tropical rainforest, 5°47'44"N, 101°50'07"E, 01.iii.2015 (1), ethanol-baited trap (W. Sittichaya).

Distribution.

Philippines; imported to Japan from Borneo and Indonesia (Maluku). New to Thailand.

Hosts.

Anisoptera sp., Dipterocarpus sp., Dryobalanops sp., Shorea spp. ( Dipterocarpaceae ), Artocarpus sp. ( Moraceae ), and an unidentified species of Sapotaceae ( Ohno 1990).

Remarks.

This species can be distinguished from all other Arixyleborus recorded in Thailand by the elytral striae and interstriae covered with small equally sized granules and without strial furrows and interstrial ridges, elytra densely setose with the setae increasing in density toward the apex.

Figures

Figure 5. Arixyleborus hirsutulus Schedl, 1969 A lateral view B dorsal view C posterolateral view D front E declivity.