Andrikothelyna rubiginosa sp. nov.

(Figs 1, 5, 9–19)

(Japanese name: sabiiro-toguro-hanekakushi)

Diagnosis. Andrikothelyna rubiginosa sp. nov. is similar to A. orientis comb. nov. but can be distinguished owing to its reddish body color (Fig. 1) and the posterior margin of tergite VIII (Fig. 17) having four prominent teeth and two tiny teeth, in contrast to only four teeth found in A. orientis comb. nov. This new species also can be recognized from other species of the genus based on the following characteristics: suboctagonal pronotum with its posterior margin slightly angulated at two points; elytra sharply carinate near its lateral margin; the elongated apical part of female spermatheca (Fig. 19).

Material examined. Holotype. Female, “ tđfiỆḒḏñü / Musha, Renai, / Nantou Hsien, TAIWAN / 7- 11. III. 2018, / Naomichi Tsuji” (KUM) . Paratypes. TAIWAN: Nantou: 3♀, same data as holotype (KUM) .

Description. Body (Figs 1, 5) robust; dorsal surface moderately glossy, and distinctly reticulated.

Color. Body reddish brown, pronotum dark red, antennae dark red; with segments I and II reddish yellow and III red, maxillary palpi, forelegs reddish yellow, meso- and meta- legs dark red.

Head. Eyes large, as long as 1/3 of head. Antennae longer than head and pronotum combined; segments II– X dilated; segments I–III elongate, segments VIII–X distinctly transverse; segment XI elongate, round at apex; approximate relative length of segments from basal to apex: 16: 17: 16: 10: 10: 10: 11: 10: 11: 12: 39.

Thorax. Pronotum, suboctagonal; middle of lateral margin slightly angulated; postero-lateral angle obtuse, posterior margin straight on medial 1/3, slightly angulated on two points. Elytra, postero-lateral angle strongly sinuate; longitudinal row of granules along suture moderate; near lateral margin sharply carinate. Mesoventral processes, apex round (Fig. 16).

Abdomen. Tergite VIII (Fig. 17) covered with rough small granules; posterior margin with 4 major teeth; tiny teeth present between medial and lateral teeth; apex of each tiny tooth with microseta; lateral teeth short, less curved medially, medial teeth slightly shorter than lateral teeth.

Legs. Slender in general; tibiae covered with fine setae. Approximate relative length of mesotarsal segments from basal to apex: 31: 10: 10: 27, and that of metatarsal segments: 54: 15: 15: 10: 32.

Male. Unknown.

Female. Tergite VII with one posteromedial granule and several small granules on medial area; posterior margin of sternite VIII (Fig. 18) finely sinuate, slightly emarginate medially. Spermatheca (Fig. 19), apical part and eggshaped, slightly longer than basal part; basal part decorated with rough structure.

Measurements (n = 4). BL ≈ 2.97–3.28; AL, 0.95–1.03; PL, 0.4–0.47; PW, 0.8–0.99; EL, 0.49–0.55; EW, 0.9–1.08; HTL, 0.55–0.63; PW/PL, 1.91–2.12; EW/EL, 1.83–2.12; AL/PL, 2.1–2.43.

Etymology. The specific name is derived from the Latin adjective “ rűbîginôsus ” which means rust-colored and refers to the body color of this new species.

Distribution. Taiwan (Nantou).

Bionomics. According to the collector, Naomichi Tsuji, individuals of the type series were collected by beating a dead vine approximately 1.5 m above the forest floor.