Xylosandrus queenslandi Dole & Beaver, 2008

Dole, Stephanie A. & Beaver, Roger A., 2008, A Review of the Australian Species ofXylosandrusReitter (Coleoptera: Curculionidae: Scolytinae), The Coleopterists Bulletin 62 (4), pp. 481-492 : 481-492

Xylosandrus queenslandi Dole & Beaver , new species

( Fig. 3 ) Description. Female: 1.6–1.9 mm long, 2.25 times as long as wide, head,

pronotum and ventral side light brown, elytra darker brown. Head with frons

convex, surface rather dull, reticulate except close to epistoma where smoother and more shining, sparsely granulate in lower third, each granule with a moderately long, fine, erect hair, upper part with a few scattered, shallow punctures, almost impunctate towards vertex. Eyes emarginate. Antennal funicle 5-segmented, with sparse erect hairs on scape and funicle, club obliquely truncate with first segment sclerotised forming a circular costa (type 1, Hulcr et al. 2007), oblique part of club densely pubescent, second segment not corneous, posterior face of club sclerotised with first segment covering entire face (type 1, Hulcr et al. 2007). Pronotum 0.9 times as long as wide, rounded in dorsal aspect (type 1, Hulcr et al. 2007), widest about one-third from base; sides very weakly convex on basal half, then very broadly rounded forming almost a semicircle, basal angles broadly rounded, anterior margin with about 8 larger asperities; anterior slope with numerous, small, transverse asperities, tending to form a concentric arrangement, decreasing in size towards summit situated one-third from base; disc with moderately dense, shallow, fine punctures, surface reticulate between punctures, a narrow triangular patch of very dense, short, erect hairs originating from closely placed punctures in the midline basally, indicating the presence of a pronotal-mesonotal mycangium, remainder of pronotal vestiture consisting of short, semi-erect hairs, longer on the anterior slope and at lateral margins; lateral aspect of pronotum rounded (type 1, Hulcr et al. 2007), with lateral costa extending more than half the length of the pronotum, not carinate. Scutellum triangular, shining, impunctate. Elytra about 1.2 times longer than wide, 1.4 times as long as pronotum; sides subparallel in basal four-fifths, then broadly rounded to apex; discal striae not impressed, much narrower than striae, punctures shallow, moderately coarse, separated by about 2–3 times their diameter, each with fine, short, semi-appressed hair; interstriae very wide, almost smooth, shining, uniseriate punctate, with punctures finer than on striae, each with moderately long erect hair, hairs becoming longer towards declivity; declivity commencing at two-thirds of elytral length, steep, but evenly curved from disc in lateral view; declivity flattened, matt, sutural interstriae weakly raised towards apex, strial punctures larger and much more closely placed, separated by less than their diameter, granulate, each with a short, semi-erect hair, interstriae much narrower than on disc, densely uniseriate granulate, on interstriae 1–4, each granule with a flattened, golden-yellow, acutely tapered seta, setae longer than strial hairs, lateral interstriae with longer, finer hairs; lateral margins of declivity marked by row of rather coarse, closely placed serrations. Procoxae widely separated. Protibiae with 4 socketed teeth on lateral margin, arranged as in X. monteithi , meso- and metatibiae 7–9 socketed teeth. First abdominal ventrite with coarse, closely placed, shallow punctures, ventrites 2–5 with punctures less coarse and less closely placed, punctures with erect hairs of varied lengths.

A total of 12 specimens were examined for this description.

Type Material. Holotype (female): AUSTRALIA, Queensland, Bunya Mountain NP, 1,100 m, ex Leguminosae tree, 19.i.2000 (B. Jordal & A. Sequeira). In QMB (Accession # T144403).

Paratypes (11)(female): AUSTRALIA, Queensland, Mt. Glorious State For [est], subtrop. Rainforest , Argyrodendron actinophyllum Edlin , intercept trap, 27.iii.–3.iv.1986, 16–23.x.1986 (Y. Basset) ( ANIC:2; QMB:1); NEQ[ueensland], 17 ° 26 9 S, 145 ° 42 9 E, Hughes Road, Topaz, 650 m , RF Intercept, 6.xii.1993 – 25.ii.1994 (Monteith, Cook, Janetzki ) ( QMB:1); Queensland , Bunya Mountain NP, 1,100 m, ex Leguminosae tree, 19.i.2000 (B. Jordal & A. Sequeira) ( MSU:2; NHML:1; RAB:1); Baron Gorge, Kuranda, 400 m, ex twig, 26.i.2000 (B. Jordal 488 & A. Sequeira) ( NHML:1; RAB:1); Queensland, Cunningham’s Gap, 700–750 m, rain forest, 20–31.xi.1963 (J. L. Gressitt) ( BPBM:1) .

Male: Unknown.

Etymology. The species is named after the Australian state in which all specimens have been found.

Discussion. The species is probably most closely related to X. abruptulus , from which it may be distinguished by the characters given in the key. Both species have declivital margins that are marked by a distinct line of granules, a character which distinguishes them from all other species of Xylosandrus sensu stricto. Preliminary phylogenetic analyses of DNA sequences for multiple genes have shown that X. queenslandi is closely related to X. morigerus and X. compactus . However, sequence data was not available for X. abruptulus and so this species was not included in these analyses (S. A. Dole and A. I. Cognato, in prep.).

Figures

Fig. 3. Lateral (A) and dorsal (B) views of Xylosandrus queenslandi, new species, 1.6–