taxonID	type	description	language	source
0391EC25FFC80B4D9A9CFF59FD71FBE5.taxon	type_taxon	Type species. Webbia dipterocarpi Hopkins, 1915; original designation.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4D9A9CFF59FD71FBE5.taxon	diagnosis	Diagnosis. 1.9 – 3.4 mm long, 2.6 – 3.75 × as long as wide. Antennal funicle 2 -, 3 - or 4 - segmented; pronotum conspicuously elongate, rectangular in dorsal view with anterolateral angles inflated (type a in dorsal view), disc flat; scutellum not apparent; elytral bases with a dense tuft of setae associated the elytral mycangia; elytra with few setae, abruptly truncate, declivity usually armed with marginal teeth or ornamented with large projections; protibiae slender, outer margin armed with more than nine denticles, posterior face inflated and unarmed or finely granulate. The genus is distinguished from the closely similar genus, Pseudowebbia Browne, by the following characters (Webbia given first): anterior margin of first antennal club segment concave or straight, distinct throughout, posterior face with no or one suture visible vs anterior margin of first antennal club segment convex, sometimes obscured by hairs laterally, posterior face with two sutures visible; pronotum elongate, widest anterior to middle, summit in anterior third, asperities subgranulate, present only anterior to summit vs pronotum not elongate, widest at or behind middle, summit at or a little behind middle, transverse asperities cover more than anterior half; elytral declivity usually with hairlike setae vs elytral declivity usually with scale-like, flattened setae; protibia narrow, with outer margin more or less evenly curved, inflated and sometimes finely granulate posteriorly vs protibia widened to an obliquely truncate apex, not inflated and granulate posteriorly. Webbia is distinguished from other genera which have species with a truncate declivity, such as Amasa Lea, Cyclorhipidion Hagedorn, and Truncaudum Hulcr & Cognato, by the absence of an apparent scutellum.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	description	Fig. 1	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	materials_examined	Type material. Holotype, female, THAILAND, Ranong Province, Khlong Na Kha Wildlife Sanctuary, 9 ° 27 ' 36.1 " N 98 ° 31 ' 19.2 " E, tropical rainforest, 140 msl, ethanol baited trap, 01. vii. 2014, W. Sittichaya (NHMW).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	diagnosis	Diagnosis. 2.2 mm long, three times as long as wide. This species is distinguished by the circumdeclivital margin denticulate; elytral declivity rather smooth and strongly shining; declivital face flat, not impressed; declivital striae very shallowly punctate, punctures inconspicuous; declivital interstriae granulate, granules small each with short brownish hair-like setae; elytra with strong, robust processes with acute apices arising from the posterolateral declivital margin; each elytral apex with a small triangular, horizontal process close to suture. The species is most similar to Webbia cornuta Schedl, W. granulosa sp. nov. and W. hatanakai Browne, but can be distinguished by the greater size of the spines on the posterolateral margin of elytra, with their length greater than their width at the base. The spines are smaller and shorter in the other three species.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	description	Description (female) 2.18 mm long (n = 1); 3.0 × as long as wide. Bicolored, head, pronotum, declivital summit, declivital face and processes brown; elytral disc and appendages pale yellowish brown, nearly white. Elytra semitransparent. Head. Epistoma entire, transverse, with a row of hair-like setae, setae short. Frons flat to upper level of eyes; subshining, with feebly elevated median line; shagreened, finely granulate, granules becoming smaller from vertex toward epistoma, sparsely covered with long erect hair-like setae. Eyes moderately emarginate just above antennal insertion, upper part slightly smaller than lower part. Submentum triangular, deeply impressed. Antennal scape clavate, thick, slightly longer than club. Pedicel narrower than scape, 2 × longer than funicle. Funicle 2 - segmented. Club flattened, circular, as broad as tall, type 2, segment 1 corneous, corneous portion small, occupying approximately basal 1 / 4 of club, its anterior margin straight on anterior face; segments 1 and 2 visible on posterior face, segment 2 narrow, pubescent on both anterior and posterior sides. Pronotum: 1.33 × as long as wide. From dorsal view long and quadrate frontally, type a, sides parallel in basal 3 / 4, quadrate anteriorly; anterior margin feebly emarginate medially, margin without serrations. In lateral view long, flattened and bulging frontally, type b, disc flat, summit approximately in anterior quarter. Anterior slope subshining, with transverse, fine, narrow asperities, becoming lower and more strongly transverse towards summit bearing short, fine, semi-recumbent hair ‒ like setae, setae longest at anterior margin becoming shorter posteriorly and ending at middle of anterior slope; disc subshining, alutaceous, glabrous, densely with minute punctures. Lateral margins weak carinate. Base feebly bisinuate, posterior angles rounded. Scutellum: minute, scarcely visible. Elytra: 1.65 × as long as wide, 1.28 × as long as pronotum. Elytral bases sinuate, with fringe of mycangial setae along the costate margin, humeral angles rounded, sides subparallel in basal 4 / 5, then angulate to apex. Apical margin with small, triangular, horizontally-directed processes. Disc convex, glabrous, shining, subtransparent; striae shallowly punctate, punctures minute, subcontiguous, separated by about half their diameter; interstriae flat, glabrous, 2 × as wide as striae. Declivity abruptly truncate, declivital margins armed with short, truncate denticles, each denticle with several short, brownish hair-like setae; declivital face flat, not impressed, rather smooth and strongly shining, bearing widely spaced setae; striae very shallowly punctate, punctures inconspicuous, each with a very short and fine seta; interstriae granulate, granules small, widely spaced, cuticle between granules flat and smooth, each granule with short brownish hair-like seta each 2 × as long as strial setae. Posterolateral margin of declivity armed with a robust process, its length greater than its width at the base, basal part quadrate, apically with an upwardly and inwardly directed, sharp spine. Apical margin with small, triangular, horizontally-directed processes. Legs. Procoxae contiguous. Protibiae slender, broadest at middle; posterior face inflated, granulate; outer margin with 12 small socketed denticles, their length shorter than basal width. Meso- and metatibiae with outer margin rounded, broadest at middle, each with 12 small socketed denticles, posterior faces flat, unarmed; anterior faces very finely granulate.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	etymology	Etymology. L. aculeatus = sharply-pointed. Adjective. The name refers to the elytral posterolateral processes with pointed spines.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	distribution	Distribution. Thailand (Ranong).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC80B4B9A9CFB1DFE6EFD85.taxon	biology_ecology	Host plants. Unknown.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	description	Fig. 2	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	materials_examined	Type material. Holotype, female, THAILAND, Sakon Nakhon, Phu Pan National Park, 17 ° 03 ′ 55.5 " N 103 ° 58 ' 10.1 " E, dry deciduous dipterocarp forest, 340 msl, ethanol baited trap, 01. iii. 2020, W. Sittichaya (NHMW). Paratypes, female, as holotype (4) (1, WSTC) (1, MSUC) (1, RABC) (1, THNHM).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	diagnosis	Diagnosis. 1.75 – 2.15 mm long (mean = 1.92 mm, n = 5); 2.92 – 3.09 × as long as wide (mean = 2.97 ×, n = 5). This species is distinguished by the elytral declivity subshining, declivital face flat not impressed, circumdeclivital margin with small, acute denticles; declivital striae and interstriae granulate, granules small, stronger on interstriae, bearing short, brownish, hair ‒ like setae; posterolateral declivital margin with a short acute process; elytral apex with small, triangular processes. The species is similar to Webbia aculeata sp. nov., W. cornuta and W. hatanakai. W. aculeata can be distinguished by the much larger size and greater length of the processes on the posterolateral margin of the elytral declivity (Fig. 1); W. hatanakai by the very coarse, closely placed strial punctures on the elytral declivity; W. cornuta by the smooth, shining elytral declivity lacking granules.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	description	Description (female) 1.75 – 2.15 mm long (mean = 1.92 mm; n = 5); 2.92 – 3.09 × as long as wide (mean = 2.97, n = 5). Frons, pronotum and elytral bases dark brown (brown in two paratypes), elytral disc, abdomen and appendages pale yellowish, declivital summit and declivity ferruginous. Head: epistoma entire, transverse, with a row of short, hair-like setae. Frons feebly convex to upper level of eyes, shining, shagreened, with feebly elevated, vertical median line extending nearly to vertex, sparsely, shallowly punctured below upper level of eyes, each puncture with an erect hair-like seta, setae much finer than those on epistoma. Eyes moderately deeply emarginate just above antennal insertion, upper and lower portions subequal in size. Submentum triangular, deeply impressed. Antennal scape thickened, slightly longer than club. Pedicel narrower than scape, 2 × longer than the 2 - segmented funicle. Club flattened, circular, as broad as tall (slightly deformed, appearing taller in holotype), type 2, segment 1 corneous, corneous portion small, occupying approximately ¼ of club, its margin concave on anterior face; segments 1 and 2 visible on posterior face, segment 2 narrow, corneous part an anterior side slender. Pronotum: 1.25 ‒ 1.31 × as long as wide (mean = 1.28, n = 5). In dorsal view elongate, quadrate frontally, type a, sides parallel in basal 4 / 5; anterior margin without serrations. In lateral view elongate, flattened, bulging frontally, type b, disc flat, summit approximately at anterior 1 / 5. Anterior slope subshining, with transverse, fine, narrow asperities, becoming lower and more strongly transverse towards summit, apical half bearing short, fine, semi-recumbent hair-like setae; setae longest at anterior margin becoming shorter posteriorly. Disc subshining, alutaceous, moderately densely, finely punctate, punctures with a very short, pale yellowish hair-like seta. Lateral margins weakly carinate. Base feebly bisinuate, margin oblique, posterior angles angulate. Scutellum: not visible from above. Elytra: 1.53 ‒ 1.73 × as long as wide (mean = 1.60, n = 5), 1.18 ‒ 1.37 × as long as pronotum (mean = 1.27 ×, n = 5). Elytral base V ‒ shaped, concave, with tuft of mycangial setae along the margin, edge costate, humeral angles rounded; sides subparallel in basal 2 / 3, then angulate to apex. Elytra smooth, alutaceous, except near scutellum and declivital summit. Disc convex, shining, subtransparent, striae punctate, punctures minute, inconspicuous, separated by 1 – 1.5 × diameters of a puncture, each puncture with a very short, fine hair ‒ like seta, setae longer toward lateral margin; interstriae flat, 2 × as wide as striae. Declivital summit dull, weakly, irregularly rugulose; declivity abruptly truncate, declivital margins armed with short, pointed denticles, each denticle with several moderately long brownish hair ‒ like setae. Declivital face flat not impressed, granulate, subshining; striae weakly granulate-punctate, interstriae granulate, granules larger than on striae, all granules with a short, strong, semi-recumbent seta; strial and interstrial setae subequal in size, but many interstrial setae slightly flattened. Posterolateral margin of declivity armed with a short, acutely pointed process on each side, processes weakly curved towards midline. Apical margin with a short, triangular process on each side next to suture. Legs: procoxae contiguous. Protibiae slender, broadest at middle; posterior face inflated, granulate; outer margin with ten short and small socketed denticles, their length shorter than basal width. Meso- and metatibiae with outer margin rounded, broadest at middle, each with nine small, socketed denticles, posterior faces flat, unarmed; anterior faces very finely granulate.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	etymology	Etymology. L. granulosus = with small granules. Adjective. The name refers to the granules on the declivital striae and interstriae.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	distribution	Distribution. Thailand (Sakon Nakhon).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCE0B499A9CFD34FE6EFEF9.taxon	biology_ecology	Host plants. Unknown.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	description	Fig. 3	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	materials_examined	Type material. Holotype. Female, THAILAND: Lamphun Province, Maeping National Park, 17 o 33 ' 25.4 ′ ' N, 98 o 52 ' 57.4 '' E, Dry dipterocarp forest, 630 m, 01. x. 2019, W. Sittichaya (NHMW). Paratypes. Female, BRUNEI: Andalau Forest Reserve, E 114.30 o, N 4.40 o, Dipterocarp forest, Dryobalanops beccarii, Fog 11: Site 7, 50 m alt., 27. viii. [19] 91, N. Mawdsley, NM 369 (1, NHML); MALAYSIA: Sabah, Sipitang, Long Meng, 4.269 N, 115.442 E, 1500 ‒ 2000 m, Plantation forest, PL- 2, ex EtOH trap, 6. x. 2018, M. L. Lardizabal et al. (1, RABC).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	diagnosis	Diagnosis: The species is one of a small group of Webbia species with a circular, truncate elytral declivity without ridges, spines or processes on the declivital face. W. penicillata (Hagedorn), W. divisa (Browne), W. spinosulcata sp. nov. and W. dasyura Browne have similar feathery setae on the face of the elytral declivity. The first three species are distinguished from W. planicauda by the deeply excavate declivity with its upper margins extended anteriorly at the suture. W. dasyura is distinguished by the concave, not flat elytral declivity, the upper margin close to the suture rounded not acute, the granules on the central part of the declivital face larger, more closely spaced and equally sized, separated by less than their own diameter. W. subuculae (Browne) and W. talautica (Eggers) have a similar, almost flat elytral declivity, with a continuous, acute margin, but the declivital vestiture is sparser, and lacks the feathery setae of W. planicauda. W. sarawakensis Schedl and W. philippinensis (Schedl) have a convex declivity, and also lack the feathery setae of W. planicauda.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	description	Description (female). 2.3 ‒ 2.8 mm long (mean = 2.55 mm; n = 3); 2.8 ‒ 3.1 × as long as wide. Body subnitid, yellowish brown, elytra becoming darker brown apically, declivity dark brown, declivital margin black. Head: frons subnitid, alutaceous, weakly convex, densely granulate-punctate above epistoma, with a dense fringe of hair-like setae covering epistoma, gradually becoming more sparsely punctate above, punctures with fine, erect, hairlike setae, a weak median ridge extending to upper level of eyes, vertex shining, impunctate. Eyes large, coarsely facetted, slightly extending onto frons, emargination triangular, deep, extending nearly half width of eye, upper part smaller than lower part. Submentum deeply impressed, broadly triangular. Antennae with scape a little shorter than club, pedicel about as wide as scape, funicle 3 - segmented, segments transverse, gradually increasing in width towards club; club approximately circular, flat, type 3, segment 1 corneous, extending less than one-quarter of club length, its anterior margin concave, segment 2 narrow, corneous, visible on both sides of club. Pronotum: 1.25 ‒ 1.4 × as long as wide. In dorsal view, elongate, sides subparallel, anterior margin subtransverse, a very weak emargination in middle, type a; anterior margin without serrations. In lateral view, long, flat, convex anteriorly, type b. Anterior slope with small, dense, transverse asperities, becoming smaller, less transverse and more granular towards summit situated at about one-third from anterior margin, bearing short, suberect, hairlike setae, longer near anterior margin. Disc subshining, finely alutaceous, moderately densely, finely, regularly punctate, punctures more closely spaced towards base, bearing short, fine, erect, hairlike setae. Lateral margins costate, more strongly at posterior angles. Base transverse, posterior angles almost rectangular in dorsal view. Scutellum: not visible. Elytra: 1.5 ‒ 1.75 × as long as wide, 1.2 ‒ 1.4 × as long as pronotum. Elytral bases weakly concave, humeral angles anterior to scutellar angles, anterior margin sharply angled close to scutellar angles, becoming rounded at humeral angles. Elytra parallelsided in basal 5 / 6 then broadly rounded to apex. Disc flat, shining, finely, rather indistinctly punctured, striae not impressed, their punctures separated by 1.5 ‒ 2 × their diameter, interstriae flat, smooth, minutely, irregularly punctured, punctures becoming stronger and denser close to declivital margin. Declivity abruptly truncate, acutely margined, margin unarmed, face circular, matt, almost flat, a very weak convexity in the middle on each side, granulate, granules of very varied sizes, separated by more than their own diameter, and partly concealed by a dense vestiture of greyish-white, subrecumbent setae, hair-like towards sides, feather-like towards middle, especially in a V-shaped central area extending from the apices to the upper margin, this area very distinct when viewed at an appropriate angle. Legs: procoxae contiguous; prosternal coxal piece inconspicuous. Protibiae slender, outer margin weakly rounded, posterior side inflated, granulate, 11 - 12 small protibial denticles extending along 5 / 6 of external margin from apex. Meso- and metatibiae broader, flattened, with numerous small denticles in apical 2 / 3.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	distribution	Distribution. Brunei Darussalam, East Malaysia, Thailand (Lamphun).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	biology_ecology	Host plants. Unknown.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCC0B489A9CFEECFB8BFF1D.taxon	etymology	Etymology. L. planus = flat; cauda = tail, referring to the flat elytral declivity.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	description	Fig. 4	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	materials_examined	Type material. Holotype, female, THAILAND, Songkhla Province, Ton Nga Chang Wildlife Sanctuary, 6 ° 59 ' 32.1 " N, 100 ° 08 ' 57.8 " E, tropical rainforest, 140 msl, ethanol baited trap, 01. iii. 2015, (W. Sittichaya) (NHMW).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	diagnosis	Diagnosis. 2.60 mm long; 2.89 x as long as wide. This species is distinguished by pronotum only 1.1 times as long as wide, upper margins of elytral declivity angularly produced forwards at the suture and armed with three or four small teeth, denticles increasing in size posteriorly; declivital margin carinate, with a fringe of hair-like setae; declivital face densely covered with semi-recumbent feathery setae, lacking spines or processes, its apical margin entire. The species is most similar to Webbia penicillata, W. divisa, W. dasyura and W. planicauda sp. nov. The first two species also possess a strongly excavate elytral declivity, with the upper margins extended anteriorly at the suture, but can be distinguished by the absence of denticles on the upper margin. W. dasyura and W. planicauda have a similar dense covering of feathery setae on the elytral declivity, but the upper margin of the declivity is not extended anteriorly.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	description	Description (female) 2.60 mm long (n = 1); 2.89 × as long as wide. Body and appendages yellowish brown, pronotal anterior slope and elytral summit darker, declivital summit ferruginous. Head: Epistoma entire, transverse, with a dense row of hair-like setae, setae moderately long. Frons weakly convex to upper level of eyes; alutaceous, finely rugose, subshining, sparsely covered with long, hair-like setae. Eyes shallowly emarginate just above antennal insertion, upper portion smaller than the lower. Submentum triangular, deeply impressed. Antennal scape regularly thick, as long as club. Pedicel as wide as scape, 4 × shorter than funicle. Funicle 2 - segmented, segment 1 shorter than pedicel. Club flattened, broader than tall, type 3, corneous, occupying approximately ba ¼ 1 / 4 of club on anterior face, anterior margin feebly convex; segments 1 and 2 visible on posterior face, segment 2 narrow, corneous, anterior margin convex; segment 3 prominent, appearing soft on anterior side. Pronotum: 1.12 × as long as wide, less elongate than usual in genus (type 8 in dorsal view); sides parallel in basal 2 / 3, quadrate anteriorly, anterior margin without serrations. In lateral view long, flattened and bulging frontally, type b, disc flat, summit approximately at anterior 1 / 3. Anterior slope subshiny, with transverse, fine, narrow asperities, becoming lower and more strongly transverse towards summit, asperities bearing short, fine, semi-recumbent, hair ‒ like setae, shorter posteriorly. Disc shiny, near the summit shagreened, base alutaceous, densely, finely punctate, punctures with short, semi-recumbent, hair-like setae (mostly abraded in holotype). Lateral margins weakly carinate. Base feebly broadly concave, edge oblique, posterior angles angulate. Scutellum: minute, scarcely visible. Elytra: 1.53 × as long as wide, 1.45 × as long as pronotum. Elytral base feebly sinuate, edge carinate, with tuft of mycangial setae along the margin; humeral angles rounded, sides subparallel in basal 4 / 5, then angulate to apex, apical margin round, entire. Disc convex subshining, alutaceous; striae with small, shallow punctures separated by about 2 × their diameter, each puncture with a short minute hair-like seta; interstriae flat, 2 × as wide as striae, each bearing two or three rows of short, semi-recumbent, hair ‒ like setae; interstriae impunctate up to apical 4 / 5 then with minute, dense, confused punctures. Declivity abruptly truncate, concave, upper margins of elytral declivity angularly produced forwards at the suture and armed with three or four small teeth, teeth increasing in size and becoming more flattened posteriorly; striae and interstriae 1 sulcate anteriorly; declivital margins sharply carinate bearing dense erect hair ‒ like setae. Declivital face impressed with a dense covering of feather-like setae. Legs: procoxae contiguous. Protibiae slender, broadest at middle; posterior face inflated, granulate; outer margin with ten short, closely placed, socketed denticles, their length less than basal width. Meso- and metatibiae with rounded outer edge, broadest at apical 1 / 3, each with 12 small, closely placed, socketed denticles, posterior faces unarmed; anterior faces finely granulate.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	etymology	Etymology. L. spina = a thorn; sulcatus = grooved or furrowed. Adjective. The name refers to the sulcate declivity bearing denticles on its upper margin.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	distribution	Distribution. Thailand (Songkhla).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFCD0B469A9CF8B9FE6EFAE9.taxon	biology_ecology	Host plants. Unknown.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC30B469A9CFA20FDC8F84D.taxon	discussion	Remarks. The holotype of Xyleboricus dissimilis (MSNG) has been examined by SMS, and images of it by all authors. The images have been compared with two specimens of Webbia costulatulus Schedl that had earlier been compared directly to paralectotypes of the species (NHML) by RAB. It is evident that X. dissimilis, known only from the holotype collected in the Mentawei Is. (Indonesia) belongs in the genus Webbia, and that the species was subsequently redescribed from West Malaysia by Schedl (1953) under the name, W. costulatulus, which is here placed in synonymy.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC30B469A9CFA20FDC8F84D.taxon	distribution	Distribution. East and West Malaysia, Indonesia (Sumatra).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC30B469A9CFA20FDC8F84D.taxon	biology_ecology	Host plants. All host records (Schedl 1953; Browne 1958, 1962) are from trees of the family Sapotaceae, an unusual host association in the Xyleborini.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFA75FA20F805.taxon	description	Fig. 5 A, 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).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFA75FA20F805.taxon	diagnosis	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).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFA75FA20F805.taxon	distribution	Distribution. Malaysia (Penang). New to Thailand (Narathiwat).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFA75FA20F805.taxon	biology_ecology	Host plants. Hopea ferrea, Shorea curtisii, Shorea maxwelliana (all Dipterocarpaceae) (Beaver & Browne 1979).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFF11FCB0FD7A.taxon	discussion	Remarks. The holotype and paratypes of W. turbinatus were not deposited in FRI as stated by Maiti & Saha (1986) and could not be examined as part of this study (A. I. Cognato pers. comm). The holotype of W. hatanakai (NHML), the description and illustration of Maiti & Saha (1986), and two non-type specimens of W. turbinata from the Andaman Islands (NMNH) that bear the same locality and host information as the holotype, and Thailand (RABC), have been compared by RAB and SMS, and found to be conspecific. The body proportions, declivital characters and total length fall within intraspecific variation. Both species were published in 1986, but W. hatanakai on March 25, and W. turbinata in August. W. turbinata is accordingly here placed in synonymy with W. hatanakai.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFF11FCB0FD7A.taxon	distribution	Distribution. India (Andaman Is.), Philippines (Palawan), Thailand.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFF11FCB0FD7A.taxon	biology_ecology	Host plants. The species has been recorded from trees in the families Dipterocarpaceae (Browne 1986; Maiti & Saha 1986), and Euphorbiaceae (Maiti & Saha 1986).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFD76FE6EFABD.taxon	discussion	Remarks. Xyleboricus orbiculatus was described from two specimens, one deposited in the Leiden Museum (now the Naturalis Biodiversity Centre), and one in the Museo Civico di Genova (now the MSNG). One of us (SMS) has examined the latter specimen, and all authors have examined photographs of it. It agrees with Eggers description, and clearly belongs in the genus Webbia to which it was transferred by Browne (1963), and not in Arixyleborus where it was placed by Schedl (1958) and Wood & Bright (1992). Here, we return it to Webbia. In order to fix the identity of the species, we here designate the specimen in MSNG as the lectotype. It bears the following labels: Sumatra / Si-Rambé / XII. [18] 90 ‒ III. [18] 91, E. Modigliani // Typus // Xyleboricus / n. g. / orbiculatus / n. sp. / cotype / Eggers descr. 1922 // Syntypus / Xyleboricus / orbiculatus // Museo Civico / di Genova // LECTOTYPE / Xyleboricus / orbiculatus / Eggers, 1923 / Sittichaya, Smith & Beaver / 2023.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFD76FE6EFABD.taxon	distribution	Distribution. Indonesia (Sumatra).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC00B459A9CFD76FE6EFABD.taxon	biology_ecology	Host plants. Unknown.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC10B439A9CF8D6FE6EFDFD.taxon	description	Fig. 5 C, D New records. Songkhla Province, Ton Nga Chang Wildlife Sanctuary, 6 ° 59 ' 32.1 " N, 100 ° 08 ' 57.8 " E, tropical rainforest, ethanol baited trap, 01. iii. 2015 (1), Surat Thani Province, Khao Sok National Park, 8 ° 55 ' 16.6 " N 98 ° 31 ' 30.4 " E, tropical rainforest, ethanol baited trap, 01. iv. 2015 (1), Trang Province, Khao Banthat Wildlife Sanctuary, 7 ° 24 ' 54.6 " N 99 ° 49 ' 47.5 " E, tropical rainforest, ethanol baited trap, 01. xii. 2013 (1), 01. ii. 2014 (1) all W. Sittichaya (3 WSTC, 1, RABC).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC10B439A9CF8D6FE6EFDFD.taxon	diagnosis	Diagnosis. 2.10 – 2.60 mm long (mean = 2.35 mm; n = 5); 2.96 – 3.21 × as long as wide (mean = 3.05 mm; n = 5). This species is distinguished by the unarmed, carinate declivital margin; upper portion of declivity slightly concave, mid-part slightly convex; declivital face with small, equally sized granules, seriately arranged in central part of declivity, more irregularly arranged towards margins; moderately densely covered with semi-recumbent, slightly flattened hair-like setae, unarmed by spines or processes. W. planicauda also has an unarmed, carinate declivital margin, but is distinguished by the denser, feathery setae covering the declivital face, concealing the granules.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC10B439A9CF8D6FE6EFDFD.taxon	distribution	Distribution. East Malaysia (Sarawak). New to Thailand (Songkhla, Surat Thani, Trang).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC10B439A9CF8D6FE6EFDFD.taxon	biology_ecology	Host plants. Unknown.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC60B439A9CFDECFEFDFB45.taxon	description	Fig. 5 E, F New record. Narathiwat Province, Hala-Bala Wildlife Sanctuary, tropical lowland forest, ethanol baited trap, 01. iii. 2015 (7), Wisut Sittichaya (7, WSTC).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC60B439A9CFDECFEFDFB45.taxon	diagnosis	Diagnosis. 1.98 – 2.11 mm long (mean = 2.04 mm; n = 5); 2.86 – 3.20 × as long as wide (mean = 3.03 mm; n = 5). This species is distinguished by the declivity abruptly truncate, matt, circumdeclivital margin armed by granules, stronger, tuberculate and distinctly separated on interstriae 1 – 3; face with three striae visible, striae 1 ‒ 2 impressed, interstriae 1 strongly raised in lower half of declivity forming a pair of large, laterally compressed spinelike tubercles, interstriae 2 ‒ 3 raised, rugose in upper half of declivity, becoming uniseriate granulate in lower half. The species is very similar to W. bituberculata (see above), but easily distinguished by the large, spine-like tubercles placed close together on interstriae on the lower part of the elytral declivity, as opposed to a pair of widelyseparated, small, tubercles in the middle of the declivity in W. bituberculata.	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC60B439A9CFDECFEFDFB45.taxon	distribution	Distribution. East and West Malaysia. New to Thailand (Narathiwat).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
0391EC25FFC60B439A9CFDECFEFDFB45.taxon	biology_ecology	Host plants. Dipterocarpus borneensis, Hopea spp., Shorea maxwelliana (all Dipterocarpaceae) (Beaver & Browne 1979).	en	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): 47-63, DOI: 10.11646/zootaxa.5264.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5264.1.3
