Coptodryas quadricostata (Schedl, 1942)

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 : 119

Coptodryas quadricostata (Schedl, 1942) Fig. 8 A–E

Xyleborus quadricostatus Schedl, 1942: 30.

Coptodryas quadricostata (Schedl): Wood and Bright, 1992: 826.

Diagnosis.

Moderately sized, 3.0 mm (N = 1) long; stout 2.0 times longer than wide; body moderately setose, brown to dark brown in color; pronotum from dorsal view round and robust (type 5; Hulcr et al. 2007), from lateral view round (type 1; Hulcr et al. 2007), anterior margin with a row of serrations, anterior half asperate, base shagreened, mesonotal mycangial tuft present along the base; elytra 1.53 times longer than pronotum, base covered with elytral mycangial tuft of setae, disc shining, covered with long golden setae, striae and interstriae 1,3,5 deeply depressed, interstriae 2,4 weakly elevated from middle of elytral and narrower behind forming horizontal sharp spines and extending beyond declivital summit, declivity densely covered with long soft hair-like strial setae and shorter interstrial setae.

Material examined.

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

Distribution.

‘Borneo’, East and West Malaysia, Indonesia (Java). New to Thailand.

Biology.

Recorded from Campnosperma sp. ( Anacardiaceae ), Shorea leprosula Miq., S. parvifolia Dyer ( Dipterocarpaceae ), Elaeocarpus sp. ( Elaeocarpaceae ), and Garcinia sp. ( Clusiaceae ). Browne (1961) notes that the species attacks small branches (1‒5 cm diameter). The gallery system usually encircles the stem, and has 1‒2 longitudinal branches in which the larvae develop ( Browne 1961).

Remarks.

This species can be distinguished from all other Coptodryas recorded in Thailand by the declivital summit with four sharp spines extending beyond the summit.

Figures

Figure 8. Coptodryas quadricostata (Schedl, 1942) A lateral view B dorsal view C posterolateral view D front E declivity.