Webbia bituberculata ( Browne, 1977 )

Sittichaya, Wisut, Smith, Sarah M. & Beaver, Roger A., 2023, New species, taxonomic changes and newly recorded species of Webbia Hopkins, ambrosia beetles from Thailand and neighbouring countries (Coleoptera: Curculionidae: Scolytinae: Xyleborini), Zootaxa 5264 (1), pp. 47-63 : 57

Webbia bituberculata ( Browne, 1977)

Fig. 5A, B

New records. Narathiwat Province, Hala-Bala wildlife Sanctuary , tropical lowland forest, ethanol baited trap, 01.i.2014 (1), 01.iii.2015 (1), W. Sittichaya (2, WSTC) .

Diagnosis. 1.90–1.99 mm long (mean = 1.95 mm; n = 2); 2.81–3.06× as long as wide (mean = 2.94 mm; n = 2); greenish brown. Elytral declivity abruptly truncate, its margin armed by granules, those on interstriae 1–3 larger, denticulate; declivital face matt, reticulate; only three striae visible on declivity, not impressed; interstriae 1 widened in apical 2/3 of declivity, the convex outer margin forming a low irregular ridge, bearing a small tubercle at about the middle of the declivity, interstriae 2 and 3 weakly raised from base of declivity to apical quarter. The species is most similar to W. suturalis Browne , but in that species, the face of the elytral declivity has a pair of larger spines on interstriae 1, close together on the lower part of the declivity near the apex ( Fig. 5 E-F).

Distribution. Malaysia (Penang). New to Thailand (Narathiwat).

Host plants. Hopea ferrea , Shorea curtisii , Shorea maxwelliana (all Dipterocarpaceae ) ( Beaver & Browne 1979).

Figures

FIGURE 5. Dorsal and lateral habitus of newly recorded Thai species A, B) Webbia bituberculata (Browne, 1977); C, D) Webbia subuculae (Browne, 1962); E, F) Webbia suturalis Browne, 1955.