Leiopus stillatus Bates 1884, sp. nov.
Creators: name: Wallin, Henrik
name: Kvamme, Torstein
name: Lin, Meiying
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Leiopus
Leiopus stillatus

description: Leiopus stillatus (Bates, 1884)
Figs. 5, 6, 43, 59, 73, 87.
A large, elongated, greyish species with numerous black spots (Figs 5–6), most similar to the Japanese species L. montanus and L. masaoi. Integument of body mostly black, with brown antennae and legs. Elytra with 4–5 weakly to relatively strongly developed costae, but no tufted tubercle. Anterior part of elytron (between scutellum and humeri) has a small, weakly raised area or weak crest with black pubescence. Large, black spots on elytra more numerous along costae. Punctuation fine and dense on entire elytra. Elytra with a transversal, oblique to distinctly black band below middle. Pronotum wider than long, with or without anterior and median tubercles, and only weakly supplied with greyish pubescence and more or less glabrous medially. Lateral spines on pronotum placed a little below middle. Sternite VII in male rounded and slightly convex. The posterior margin of the sternite VII in female sharp (rounded in L. montanus). Examined males: length 11.0 mm, width 3.0 mm; female: length 8.0 mm, width 2.5 mm. Aedeagus: Approx. 2.0 mm long, relatively slender, narrowed and weakly curved towards apex (acutely curved in L. monatus), dorsal ridge as wide as ventral ridge, with a longitudinal furrow (Fig. 59). The sclerites at proximal end of basal segment are large, and the median fork-like sclerite inside the internal sac fine; surrounding intersegmental membrane has square-shaped micro-reticulation (Fig. 43). Median fork-like sclerite inside the internal sac more similar to L. monatus (Fig. 42) than any other Leiopus species. Tegmen: Approx. 2.0 mm, parameres robust, and only weakly flattened dorso-ventrally at apex (Fig. 73), well separated medially along inner margin but curved inwards at apex (short and slender in L. monatus). Apex evenly rounded along entire posterior margin, with fringes of short, brownish hairs well concentrated at edge of apex with single hairs medially. Entire surface of parameres granulated. Base of tegmen extended and strongly curved dorso-ventrally towards the middle, and acutely curved at base of parameres. Tergite VIII: Approx. 1.0 mm long, dark brown with posterior margin rounded, covered with short, very fine brownish hairs distally towards the posterior margin (Fig. 87). Surface with very weak micro-reticulation. Spermatheca: Yellowish, relatively short, widened at base, and strongly curved about 45° towards apex. Apex with an elongated head similar in shape to L. flavomaculatus sp. nov.
Remarks: The combination of large size, elongated body, uniform grey pubescence, black-spotted elytra and lack of tufted tubercles on elytra, easily separates this species from all other species of Leiopus from China. The male genitalia characters are similar to all other examined species of Leiopus but not Acanthocinus. This species has a wide distribution in the eastern part of the Palaearctic Region from Far East Russia to the Korean peninsula, Japan and China. In China it has a wide distribution, from Heilongjiang and Jilin Provinces in NE China, Hebei Province in N China to Jiangxi and Zhejiang Provinces in CE China.
description: Published as part of Wallin, Henrik, Kvamme, Torstein & Lin, Meiying, 2012, A review of the genera Leiopus Audinet-Serville, 1835 and Acanthocinus, Dejean, 1821 (Coleoptera: Cerambycidae, Lamiinae, Acanthocinini) in Asia, with descriptions of six new species of Leiopus from China, pp. 1-36 in Zootaxa 3326 on page 7, DOI: 10.5281/zenodo.281207