Acanthocinus (Acanthobatesianus) guttatus Bates 1873, comb. nov.
Creators: name: Wallin, Henrik
name: Kvamme, Torstein
name: Lin, Meiying
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Acanthocinus
Acanthocinus guttatus

description: Acanthocinus (Acanthobatesianus) guttatus (Bates, 1873) comb. nov.
Figs. 24, 25, 47, 69, 83, 97.
A small and slender species (Figs 24, 25) resembling A. griseus (Figs 26, 27). Legs and antennae (antennae 2– 3 x longer than body) very long, and male genitalia similar to those in Acanthocinus but not Leiopus. However, the species differs from Acanthocinus in line with the diagnosis given above, and thus we transferred it from Leiopus to the new subgenus Acanthobatesianus.
Pronotum with 3 weak and glabrous tubercles (2 anterior and 1 median), more pronounced in females. Antennal scape only slightly shorter than antennomere II. Elytra covered with relatively fine, dense punctures. Colour brownish with an oblique whitish transversal band on middle of elytra, interrupted by a narrow dark brown band below middle and a few scattered brownish spots on elytra. Elytra with 2 very weak costae medially, and a glabrous raised ridge near the base of elytra on each side of scutellum. Pronotum with a short and acutely narrowed spine on each side in middle. First tarsal segment on hind legs as long as the remaining segments combined (in A. griseus slightly longer than the remaining segments combined). Separated from A. griseus by antennomeres III–V not fimbriate beneath (at most with a few sub-erect long hairs, as in A. reticulatus), a lack of distinct whitish transversal band on the middle of elytra, lack of 4 tufted, yellowish tubercles on near anterior margin on pronotum, shorter first tarsal segment on hind legs, and the posterior margin of sternite VII in males convex and rounded (deeply notched in A. griseus). Sternite VII in female A. guttatus slightly shorter than in A. griseus. Ovipositor in A. guttatus short and yellow to brown and that in A. griseus black and very long, often extending far beyond the last abdominal segments.
Examined male length 7.5 mm, width 2.5 mm; female length 8.5 mm, width 3.0 mm. Aedeagus: Similar to that of A. griseus (Fig. 70); approx. 1.5 mm long, very slender, narrowed and weakly curved towards apex, dorsal ridge as wide as ventral ridge and very flat at apex (Fig. 69); apical part weakly sclerotized. The crescent-shaped sclerites at proximal end of basal segment sharply square-shaped, and the double fork-like (apical part extended and distal part forming a shorter, curved fork-like part) median sclerite inside the internal sac slightly elongated; surrounding intersegmental membrane with fine, square-shaped micro-reticulation (Fig. 47). Very short sclerites inside the internal sac similar to those of the European species A. reticulatus but in the latter only distal part of sclerites with a curved and fork-like part. Tegmen: Approx. 2.0 mm, parameres slender and flattened dorsoventrally, and not separated medially (Fig. 83). Apex evenly rounded along entire posterior margin, with fringes of short, yellowish hair well concentrated at edge of apex. No micro-reticulation on parameres. Base of tegmen extended and weakly curved dorso-ventrally towards the middle. Median lobe (mainly tegmen) long and evenly curved below the parameres, strongly narrowed towards the base of tegmen, with no twisted part on the middle of tegmen. Parameres almost identical to all other examined species of Acanthocinus. Tergite VIII: Approx. 0.8 mm long, dark brown and covered with short, very fine yellowish hairs distally towards the elongated (pointing) posterior margin (Fig. 97). Entire surface with distinct square-shaped micro-reticulation. Tergite VIII without deep notch or concavity found in all other examined species of Acanthocinus. Spermatheca: Approx. 0.2 mm long, weakly sclerotized straight shaft and transparent (soft) head with a very short secondary shaft connected to the head. The presence of a very long secondary shaft was found in A. aedilis (Fig. 56) and A. griseus.
Remarks: This species is known from Japan, South Korea, and Jiangxi Province of 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 20, DOI: 10.5281/zenodo.281207