Uracanthus regalis McKeown, 1948

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 : 24-25

Uracanthus regalis McKeown, 1948

(Figs 26, 64, 97)

Uracanthus regalis McKeown, 1948: 54 .

Description

Male. Body length, 17.19–35.69 mm; width, 3.28–7.6 mm.

Colour (Fig. 26). Body blackish brown with head, thorax, femora, and basal elytra darker. Head with dense white pubescence except median frontal groove and a glabrous area on vertex. Pronotum with 2 wide longitudinal stripes of white pubescence on each side: 1 on disc and 1 near ventral side; remaining part of pronotum with golden pubescence. Each elytron with a large subtriangular glabrous mark starting from shoul- der and ending at about basal 1/3 of elytra, margined with a vague line of dense white pubescence; disc of each elytron with 4 vague, longitudinal lines of dense white pubescence interspaced with lines of sparse pubescence. Body colour varies from blackish brown to reddish brown. The subtriangular glabrous marks on elytra may be slightly reduced or expanded.

Head. Postclypeus triangular, convex and finely dense punctate; frontoclypeal suture wide and deep in middle; distance between lower lobes of eyes 1.75–2.0 × as long as distance between upper lobes of eyes; distance between upper lobes of eyes 1.20–1.30 × as long as distance between eyes on ventral side; genal length 0.48–0.62 × as long as head width below eyes. Antennae slightly shorter than body; segments 5–10 flattened and slightly produced on one side at apex; apical ¼ of segment distinctly thinner than basal ¾.

Thorax and abdomen. Pronotum 1.11–1.39 × as long as width, rounded at side; posterior margin 1.33– 1.43 × as wide as anterior margin; disc smooth and finely punctate with 2 small nodules in middle; disc and side strongly rugose transversely. Scutellum semicircular, with dense pubescence. Elytra 4.37–4.92 × as long as prothorax and 3.27–3.79 × as long as shoulder width; each elytron with 3 feeble longitudinal carinae; apex narrowly emarginate and bispinose, sutural spine larger than marginal one. Apex of terminal sternite truncate.

Male terminalia. Apex of ventral median lobe narrowly emarginate and apex of dorsal lobe slightly pointed; ventral lobe longer than dorsal lobe; spined region of internal sac 7.0–7.2 × as long as basal unspined regions; spined region divided into three sections: first section with dense clustered long simple spines; no unspined gap between first and second sections; second section with sparse short simple spines; a wide unspined gap between second and third sections; third section with very sparse short simple spines ( Fig. 64a). Eighth sternite strongly obliquely truncate at sides, apex strongly emarginate and V- shaped, with fairly dense setae arising terminally; ventral surface with dense cloud-like processes present and fairly dense short simple spines ( Fig. 64b). Apex of eighth tergite more or less rounded and sometimes slightly emarginated; dorsal surface with dense simple spines and multi-branched spines ( Fig. 64c). Paramere 1.7–1.98 × as long as wide, cylindrical in shape; apex rounded with long and short setae ( Fig. 64d).

Female. Body length, 18.21–35.69 mm; width, 3.28–7.6 mm.

Similar to males but differs in having more robust body and shorter antennae; elytra slightly longer and wider, 3.36–3.82 × as long as shoulder with and 4.12–4.84 × as long as prothorax; apical ¼ of antennal segment 11 slightly thinner than basal ¾; apex of terminal sternite rounded.

Ovipositor and spermatheca. Ovipositor short; styli arising terminally with short hairs ( Fig. 64e). Spermatheca clearly curved; spermathecal gland long and arising at base ( Fig. 64f).

Distribution Western and southwestern Western Australia ( Fig. 97).

Biology The only known host is Banksia sp. Adults were collected from August to February and attracted to light. Comments

This species resembles U. dubius but differs in having the body more robust and the subtriangular mark on the elytra broader and more distinct; the elytra with fewer and wider longitudinal lines of white pubescence, and the elytral apex very narrowly emarginate.

Material examined

Holotype. ♀. WA: Denmark (34º58'S, 117º21'E), Coll. no. K67661 , bearing a red holotype label; 2 segments of left antenna missing ( AM).

Other material examined. 15 ♂, 18 ♀. WA: 1 ♂, South Perth (31º58'S, 115º51'E), 3.ii.1975, K. T. Richard ( WADA) ; 1 ♂, same locality but 12.xii.1904, H. M. Giles ( NMV) ; 1 ♂, same locality as above but H. M. Giles, F. E. Wilson Collection ( NMV) ; 1 ♀, Yanchep , 17.ix.1970, at light, S. J. Curry ( WADA) ; 1 ♂, same data as above but 15.iii.1970 ( WADA) ; 1 ♂, Denmark (34º58'S, 117º21'E), ii.2002, M. L. & S. Jone ( WAM) ; 1 ♂, Lockwood Spring (27º46'S, 114º28' E), Kalbaroi, 6.vii.1940, K. Youngson & R. Johnane ( WAM) ; 1 ♀, Kalamunda (31º58'S, 116º03'E), 24.x.1962, J. Dell ( WAM) ; 1 ♀, Bateman , 11.x.1998, hand collecting, P. R. Davis ( WADA) ; 1 ♀, Kukerin , 8.xii.1993, UV light trap, A. Szito ( WADA) ; 2 ♂, Woodridge , intercept trap, 20– 30.x.1996, H. Demarz ( WADA) ; 1 ♀, same data as above but ( ANIC) ; 1 ♀, Esperance , 31.x.1951, E. F Wilson Collection, W. L. Brown ( NMV) ; 1 ♂, 16 km NW of Eneabba , 9–12.ix.1987, at gas light, at night, T. F. Huston ( WAM) ; 1 ♂, Mukcain ( WAM) ; 1 ♀, Dianella , in Shopping Center, 25.ix.1995, A. Szito ( WADA) ; 1 ♂, Moore River National Park (31º10'S, 115º40'E), 3–4.iv.1991, at gas light, at night, T. F. Huston ( WAM) ; 1 ♀, 40 km N of Badgingarra , 15.iii.1995, UV light, A. Szito ( WADA) ; 1 ♀, in Banksia , C446 ( QDPI) ; 1 ♂, Maylands , 28.iii.1974, on door, J. T. Curry ( WADA) ; 1 ♂, North Tarin Rock Nature Reserve (32º59'S, 118º14'E), 16– 18.x.1985, T. F. Houston, Coll. no.618-1 ( WAM) ; 1 ♂, 2 ♀, Swan River , J. Clark ( WADA) ; 1 ♀, Onslow , 14.iii.1965, B. G. Muir ( WAM) . 1 ♀, Albany ( NMV) ; 1 ♀, 2 miles S by SW of Mt Ragged , 13.xi.1969, M. S. Upton ( ANIC) ; 1 ♀, 25 km N Eneabba (29º36'S, 115º15'E), 24–25.x.1984, A. A. Calder ( ANIC) ; 1 ♂, 5 km W of Quairading , 1.x.1992, E. D. Edward & E. S. Nieson ( ANIC) . Locality unknown : 1 ♀, E. F. du Boulay Collection, det by K. C. McKeown as U. sp. ( WAM) ; 2 ♀, no data, H. J. Carter Collection ( NMV) ; 1 ♀, no data, Hope / Westwood Collection ( HMO) .