A new species of Prosopocoilus Hope & Westwood, 1845 from China and Vietnam (Coleoptera: Lucanidae: Lucaninae) Author Wang, Cheng-Bin Engineering Research Center for Forest and Grassland Disaster Prevention and Reduction, Mianyang Normal University, 166 Mianxing West Road, Mianyang 621000, Sichuan, P. R. China. Author Wang, Yu 0000-0003-0936-5703 Ocean and Biological Engineering College, Yancheng Normal University, 2 Hope Avenue, Yancheng 224000, Jiangsu, P. R. China. wangyuyctu @ 163. com. https: // orcid. org / 0000 - 0003 - 0936 - 5703 text Zootaxa 2021 2021-12-20 5082 4 384 392 journal article 2896 10.11646/zootaxa.5082.4.6 709ed2ff-5069-49c4-9490-5378ce7ce01b 1175-5326 5792821 B3EB42B1-F23A-42D4-A296-987F7AAB9F8E Prosopocoilus zhuchuangi Wang & Wang , new species Figs. 1A–F ; 3A, B, D–I ; 4A, B ; 5A–D ; 6A–D, I–K ; 7A–C Prosopocoilus sp. : Fujita, 2010: 206 , pl. 125, figs. 628-1, 2 (characteristics; distribution; illustrations). Prosopocoilus fulgens (Didier, 1927) : Nguyen et al . 2018: 8 , figs. 1–8 (redescription; distribution; illustrations) [misidentification]. Type material. Holotype : ♂ , CHINA , Guizhou : Libo County , Maolan Nature Reserve [K兰H然保护区], 400– 500m , 15.VII.2021 , Ke-Lun Wu leg. ( MYNU ) . Paratypes : 2♂♂ , VIETNAM : Yen bai , 25. VI .2020, local collectors leg. ( CCZN ). Description of the holotype , male. Body length 24.8 mm ; 3.2 times as long as wide, widest at basal 2/7 of elytra. Length of particular parts: head ( 5.6 mm ), mandible ( 6.1 mm ), pronotum ( 4.8 mm ), elytra ( 12.8 mm ); width: head (7.0 mm), pronotum ( 8.3 mm ), elytra ( 8.6 mm ). Habitus ( Figs. 1A–C ). Color mostly blackish, including mandibles, head, pronotum, scutellum and legs; elytra dark brown, each with reddish band in middle part; ventral side dark reddish brown. Body generally lustreless and glabrous. Head twice as broad as long, broadest at canthi, covered with coarse wrinkles dorsally. Vertex gradually depressed in a triangular area bordered by anterolateral angles and posterior margin of head. Anterolateral angles rounded. Clypeolabrum ( Fig. 3A ) linguiform, slightly emarginate apically. Canthus slender, almost reaching middle of outer margin of eye. Preocular margin concave. Postocular margin slightly convex. Mandible short, about 1.1 times as long as head, slightly curved, pointed at apex, and with 5–7 subrounded inner teeth. Antennal club with 3 pubescent antennomeres; antennomere VII rather sharply acuminate; antennomeres VIII–X lamellate. Mentum subtrapezoidal, with anterolateral angles rounded, covered with coarse punctures. Submentum inverted trapezoidal, covered with coarse wrinkles. Gula elongate, smooth. Pronotum 1.7 times as wide as long, widest at lateral angles, and 1.2 times as wide as head. Lateral margin minutely crenulate, weakly rounded before lateral angle and slightly concave after lateral angle. Posterior margin weakly bisinuate. Lateral angles blunt in dorsal view. Posterior angles rounded. Surface mostly covered with coarse wrinkles, changing to coarse punctures in lateral parts. Scutellum linguiform. Surface roundly punctate. Elytra 1.5 times as long as wide, widest around basal 2/7, and almost as wide as pronotum. Surface micropunctate and smooth, with only roundish punctures at base. FIGURES 1A–F. Male habitus of Prosopocoilus zhuchuangi Wang & Wang , new species in dorsal ( A, D ), ventral ( B, E ) and dorsolateral ( C, F ) view. A–C, holotype, from Guizhou, China; D–F, paratype, from Vietnam. Scale bar = 1.0 cm. FIGURES 2A–C. Male habitus of Prosopocoilus fulgens (Didier, 1927) from Yunnan, China, in dorsal ( A ), ventral ( B ) and dorsolateral ( C ) view. Scale bar = 1.0 cm. FIGURES 3A–L. Male clypeolabrums ( A–C ) and tibiae ( D–L ) of Prosopocoilus species in dorsal view. D, G, J, protibiae; E, H, K, mesotibiae; F, I, L, metatibiae. A, D–F, P. zhuchuangi Wang & Wang , new species , holotype, from Guizhou, China; B, G–I, P. zhuchuangi Wang & Wang , new species , paratype, from Vietnam; C, J–L, P. fulgens (Didier, 1927) from Yunnan, China. Scale bar = 1.0 mm. FIGURES 4A–D. Male abdominal segments VIII of Prosopocoilus species. A , C, tergites VIII in dorsal view; B, D, sternites VIII in ventral view. A, B, P. zhuchuangi Wang & Wang , new species , holotype, from Guizhou, China; C, D, P. fulgens (Didier, 1927) from Yunnan, China. Scale bar = 1.0 mm. Legs . Protibia ( Fig. 3D ) with 6–8 large teeth, more or less crenellate along outer margin; apex forked with sharp branches at apex. Mesotibia ( Fig. 3E ) with one lateral spine, and metatibia ( Fig. 3F ) without lateral spines except apical spurs and spines; mesal sides with a fringe of dense setae in apical 2/3. Male genitalia . Abdominal tergite VIII ( Fig. 4A ) membranous along midline; sternite VIII ( Fig. 4B ) with a transverse oval membranous area in middle part, slightly sclerotized along midline. Abdominal tergite IX ( Figs. 5B, C ) rounded at anterior margin; pleurite IX ( Fig. 5C ) dorsally separated; sternite IX ( Fig. 5A ) with a “U”-like membranous area in middle of apical part. Aedeagus with paramere ( Figs. 6A–D ) about 2/3 of length of basal piece, without basal process, and with bluntly rounded basal angle at upturned apex ( Figs. 6B, D ); basal piece ( Figs. 6I–K ) distinctly constricted in basal part, with pair of sclerotized dorsal plates; ventral plate ( Fig. 6I ) with short forked process in middle of apical margin, not longer than lateral processes; median lobe ( Figs. 7A–C ) relatively narrow, moderately widened in apical part; flagellum ( Figs. 7A–C ) long, trifurcate, about 2.1 times as long as parameres, apex slightly enlarged. Male paratypes . Body 24.6–27.5 mm long. All male types have the same body shape, with no apparent variation. Female. Unknown. Etymology. The new species is dedicated to Mr. Chuang Zhu (Nanjing University of Aeronautics and Astronautics, Nanjing, China ), an amateur entomologist. The name is a noun in the genitive case. Distribution. China ( Guizhou ) and Vietnam . Differential diagnosis. Prosopocoilus zhuchuangi Wang & Wang , new species is closely related to P. fulgens , sharing a fringe of dense setae in the apical 2/3 of the mesal sides of the mesotibiae and metatibiae ( Figs. 3E, F, H, I, K, L ). It is, however, distinguishable from the latter by the combination of characters shown in Table 1 .