A taxonomic study on the nominate subgenus Macrolycus Waterhouse, 1878 from China (Coleoptera, Lycidae) Author Du, Ruolan Key Laboratory of Zoological Systematics and Application, School of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding 071002, Hebei Province, China Author Yang, Yuxia Key Laboratory of Zoological Systematics and Application, School of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding 071002, Hebei Province, China Author Yang, Xingke Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China Author Liu, Haoyu Key Laboratory of Zoological Systematics and Application, School of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding 071002, Hebei Province, China text Zootaxa 2024 2024-03-14 5424 3 358 366 http://dx.doi.org/10.11646/zootaxa.5424.3.4 journal article 10.11646/zootaxa.5424.3.4 1175-5326 10821192 9F446F11-2997-43AE-BD75-1AA60049D321 Macrolycus subapicis Y. Yang, Du & Liu , sp. nov. ( Figs 2D , 3J–L ) Diagnosis. The species resembles M. yunnanus Kazantsev, 2001 in appearance, but can be distinguished from the latter by the lamella of antennomere III 1.1 times as long as the antennomere itself ( Fig. 2D ); subapical part of phallus strongly inflated laterally in ventral view, 3.5 times as wide as basal part ( Fig. 3K ) and strongly inflated ventrally in lateral view ( Fig. 3L ). In comparison, the lamella of antennomere III of M. yunnanus 0.8 times as long as the antennomere itself ( Kazantsev 2001 : fig. 1); subapical part of phallus feebly inflated laterally in ventral view, 2.5 times as wide as basal part ( Kazantsev 2001 : fig. 2) and flat ventrally in lateral view ( Kazantsev 2001 : fig. 3). Etymology. The specific name is derived from the Latin sub- (under, below, beneath) and apex (summit, peak, tip), referring to its characteristic subapical part of phallus. Type material. Holotype . CHINA • ♂ (MHBU ) , Yunnan , Nujiang, Biyuhe, 2600‒2900m , VII.2023 , Z. Pan leg. Description . Male ( Fig. 2D ). Length 12.0 mm, width at humeri 3.1 mm . Body black. Pronotum and elytra orange red. Surface covered with decumbent orange red pubescence. Eyes small, interocular distance about twice greater than the diameter of an eye.Antennae flabellate, overlapping basal 2/3 length of elytra when inclined, antennomeres III‒XI lamellate and slender, lamellae pointed at apices, lamella of III 1.1 times as long as the antennomere itself, lamella of VIII longest, 2.6 times longer than joint itself ( Fig. 2D ). Pronotum trapezoidal, 1.1 times wider than long. Anterior margin widely rounded and projecting anteriad, lateral margins sinuate and posterior margin bisinuate; anterior angles rounded, posterior angles sharp and projecting laterally. Scutellum trapezoidal, straight at apex ( Fig. 2D ). FIGURE 3. Aedeagi of Macrolycus species , dorsal views: A–C. M. oreophilus Kazantsev, 2002 ; D–F. M. gansuensis Kazantsev, 2002 ; G–I. M. bowringi Waterhouse, 1878 ; J–L. M. subapicis sp. nov. (holotype). A, D, G, J: dorsal views; B, E, H, K: ventral views; C, F, I, L: lateral views. Scale bars: 1.0 mm. Elytra leaf-like, 3.1 times longer than humeral width. Costa I as strong as II and IV, costa III weak but visible in whole length ( Fig. 2D ). Aedeagus ( Figs 3J–L ) moderately sclerotized. Parameres moderately developed and spoon-shaped, about 2/7 length of phallus, with lateral margins converging apically in ventral view ( Fig. 3K ) and widely emarginate in lateral view ( Fig. 3L ). Phallus abruptly expanded at basal 1/4 portion, then parallel-sided in dorsal and ventral views ( Figs 3J, K ), subapical part strongly and asymmetrically inflated laterally, about 3.5 times as wide as basal part, with a fusiform ventral-cavity, apical part parallel-sided, apex about 0.32 times as wide as subapical part; basal part bisinuate at basal part and bent dorsally near middle in lateral view ( Fig. 3L ), subapical part strongly inflated ventrally, apical part progressively constricted distad. Female. Unknown. Distribution. China ( Yunnan ).