Uracanthus perthensis, Thongphak & Wang, 2007

Thongphak, Duangrat & Wang, Qiao, 2007, Taxonomic revision of the longicorn beetle genus Uracanthus Hope 1833 (Coleoptera: Cerambycidae: Cerambycinae: Uracanthini) from Australia., Zootaxa 1569 (1569), pp. 1-139 : 15-16

Uracanthus perthensis , sp. nov.

(Figs 21, 60, 94)

Description

Male. Body length, 17.57–21.61 mm; width, 3.23–4.84 mm.

Colour (Fig. 21). Head, thorax, basal elytra dark reddish brown; antennae, legs and the remaining part of elytra reddish brown. Head (except a longitudinal glabrous area on vertex), legs, and abdomen with fairly dense white pubescence. Prothorax covered with short white pubescence except glabrous median longitudinal line and 2 raised nodules on disc; pronotum with 2 vague longitudinal stripes of dense white pubescence on each side: 1 on disc and 1 near ventral side. Elytra covered with fairly dense short white pubescence; each elytron with a large subtriangular glabrous mark, extending from shoulder to basal 1/3, margined with a very vague line of dense white pubescence; apical areas with relatively sparse short white pubescence.

Head. Postclypeus semicircular and slightly convex, with dense coarse punctures; frontoclypeal suture deep and narrow in middle; distance between lower lobes of eyes 1.82–1.83 × as long as distance between upper lobes of eyes; distance between upper lobes of eyes 1.1–1.2 × as long as distance between eyes on ventral side; genal length 0.48–0.55 × as long as head width immediately below eyes.

Thorax and abdomen. Pronotum 1.11–1.20 × as long as width; rounded and with a feeble process at each side; posterior margin 1.25–1.36 × as wide as anterior margin; pronotal disc binodulose in middle, and rugose transversely near anterior and posterior margins. Scutellum semicircular, with dense pubescence. Elytra 4.71– 4.72 × as long as prothorax and 3.41–3.69 × as long as shoulder width; each elytron with 3 feeble longitudinal carinae; basal elytra finely punctate and smooth; apex widely emarginate and bispinose, sutural spine longer and more acute than marginal one. Apex of terminal sternite truncate.

Male terminalia. Apex of ventral median lobe more or less truncate with a very shallow notch and apex of dorsal lobe rounded; ventral lobe much longer than dorsal lobe; spined region of internal sac 4.98–5.12 × as long as basal unspined region; spined region divided into 2 sections with an unspined gap between sections: first section much longer than unspined gap and second section, with dense long simple spines; second section with sparse simple spines ( Fig. 60a). Eighth sternite obliquely truncate at sides, shallowly and widely emarginate at apex, with long and fairly long setae arising terminally ( Fig. 60b); ventral surface with very sparse multi-branched spines and fairly dense cloud-like processes. Eighth tergite slightly emarginate (almost truncate) at apex ( Fig. 60c), with fairly dense short simple spines and multi-branched spines on dorsal surface. Paramere long, 1.86–2.04 × as long as wide, cylindrical in shape, apex rounded with long and short setae ( Fig. 60d).

Female. Unknown.

Distribution Western Western Australia ( Fig. 94)

Biology Hosts are unknown. Adults were collected in March.

Comments

This new species was treated as Var. C of U. triangularis by Lea (1916). It resembles U. maculatus , sp. nov., but differs in having the pubescence on the elytral disc more or less even; elytral apex more deeply emarginate, and sutural apical spine longer.

Material examined

Holotype. ♂. WA: Perth; bearing a red holotype label ( NMV).

Paratype. 1 ♂. WA: Perth, iii.1916; bearing a blue paratype label ( WAM) .