New species and taxonomic notes on Lycocerus hickeri species-group (Coleoptera Cantharidae) Author Xi, Huacong 0000-0002-3612-2523 The 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 Wang, Younan 0000-0001-6070-4892 The 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. & wangyounan @ stumail. hbu. edu. cn; https: // orcid. org / 0000 - 0001 - 6070 - 4892 wangyounan@stumail.hbu.edu.cn Author Yang, Xingke Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China. xihuacong 5253 @ 163. com; https: // orcid. org / 0000 - 0002 - 3612 - 2523 Author Liu, Haoyu 0000-0003-1383-5560 The 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. & liuhy @ hbu. edu. cn; liuhy @ aliyun. com; https: // orcid. org / 0000 - 0003 - 1383 - 5560 liuhy@hbu.edu.cn Author Yang, Yuxia 0000-0002-3118-6659 The 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. & yxyang @ hbu. edu. cn; https: // orcid. org / 0000 - 0002 - 3118 - 6659 yxyang@hbu.edu.cn text Zootaxa 2021 2021-06-02 4980 3 541 557 journal article 5943 10.11646/zootaxa.4980.3.5 e6e68116-fbef-4ce3-a454-ad98875b9fe4 1175-5326 4897200 E65004FA-DCD1-4123-96BA-B76729057133 Lycocerus mainriensis Y. Yang et Xi , sp. nov. Figs 1C–D , 2D–F , 6B , 7B Type material. Holotype : ♂ ( MHBU ), “ China , Yunnan , Hengduan mts-part MEILI, 3700 m , 28˚06’N, 98˚52’E, 10.–13.vii.1996 , leg. Vít Kubáň ” . Paratypes : 1♀ ( MHBU ), same data as holotype ; 2♀♀ ( MHBU ), “ China , Yunnan , Hengduan mts-part MEILI, 3300 m , 28˚06’N, 98˚53’E, 8.–10.vii.1996 , leg. Vít Kubáň ” . Description. Male ( Fig. 1D ). Body black, mandibles brown, pronotum red, with two large dark brown markings on both sides which conjoint in center of disc, elytra red, darkened at the whole length of all elytral interstices. Body densely covered with short, decumbent brown pubescence. Head evenly narrowed behind eyes, surface densely and finely punctate; eyes moderately protruding, head width across eyes wider than anterior margin of pronotum; terminal maxillary palpomeres long-triangular, arcuate and sharp at apical one-third length of inner margins; antennae subfiliform, extending to elytral mid-length when reclined, antennomere II shortest, nearly as long as wide at apices, III‒VIII slightly obliquely widened apically and long-triangular, III about 2.5 times as long as wide at apices, III‒XI each with an oblong to round smooth impression at apical part of inner margin, IV widest and slightly shorter than III, VII longest, IX‒XI nearly parallel-sided, XI longer than X and pointed at apices. Pronotum about 1.2 times wider than long, widest at base, anterior margin arcuate, lateral margins moderately diverging posteriorly, posterior margin slightly arcuate, anterior angles rounded, posterior angles rectangular, disc moderately convex at postero-lateral parts, surface semillustrous, sparsely punctate than that on head. Elytra about 5.1 times longer than pronotum, 3.1 times longer than humeral width, which about 1.4 times wider than posterior margin of pronotum, lateral margins moderately diverging posteriorly, elytra venations strongly developed and costate, surface semillustrous, wrinkled, densely and very finely punctate. Legs slender, all claws simple. Aedeagus ( Figs 2D–F ): ventral process of each paramere nearly straight both in ventral and lateral views, with apex feebly expanded and rounded; dorsal plate nearly as long as ventral process, longitudinally ridged laterally on inner surface, with inner margin protuberant in middle, apical margin rounded and feebly emarginate at outer apical angle, which obtuse-angled in lateral view; laterophyse feebly shorter than dorsal plate, with apex acutely hooked and bent dorsally, opposite to apical end of longitudinal ridge of dorsal plate. Female ( Fig. 1C ). Similar to the males, but eyes less protruding, antennae shorter, extending to basal one-third length of elytra when reclined, III‒XI without impressions, pronotum wider, 1.3 times as long as wide, feebly convex on postero-lateral parts of disc, elytra darkened only at the first and second elytral interstices, pro- and mesoouter tarsal claws each with a digitiform tooth at base. Abdominal sternite VIII ( Fig. 6B ) roundly emarginate in middle and deeply and nearly triangularly emarginate on both sides of posterior margin, lateral emarginate parts deeper than the middle one, the portion between lateral and middle emarginate parts acute-angled at apex, middle emarginate part membranous-lobed basally and lateral emarginate parts membranous-lobed laterally, latero-apical angles subtruncate at apices, not reaching apices of the portions between lateral and middle emarginate parts. FIGURE 2 . Aedeagus (A, D. ventral view; B, E. dorsal view; C, F. lateral view): A –C. Lycocerus nigrobilineatus Pic, 1916 ; D–F. L. mainriensis sp. nov. Scale bars: 1.0 mm. Internal organ of reproductive system ( Fig. 7B ): vagina stout and abruptly thinned at ventro-apical portion into a stout tube, where diverticulum and spermathecal duct arising separately; diverticulum moderately long, evenly thin and spiral; spermathecal duct obviously shorter and thicker than diverticulum; spermatheca provided with a spiral tube, longer than diverticulum, abruptly thinned at basal one-third, with the basal portion even in diameter and obviously thicker than apical portion; basal portion of spermatheca extended into a short thick tube, where accessory gland opening, thin and much longer than spermatheca. Body length: 8.0–9.0 mm ( 8.5 mm in holotype ); width: 2.1 ‒ 2.3 mm ( 2.2 mm in holotype ). Diagnosis. The new species is similar to L. nigrobilineatus but can be distinguished from the latter by the following characters: male with the pronotum wider than long, elytra with strongly developed venations on disc, lateral margins diverging posteriorly, the surface semilustrous. The aedeagus has the dorsal plates of parameres nearly as long as the ventral processes and inner margins obviously protuberant in middle. Unlike the new species, L. nigrobilineatus has the pronotum longer than wide, elytra with weakly developed venations, lateral margins nearly parallel, surface matt, and dorsal plates of parameres is shorter than the ventral processes and inner margins feebly protuberant in middle. Female has the basal portion of spermatheca extended into a short tube, where accessory gland opening, the abdominal sternite VIII is emarginate in the middle part and membranous-lobed basally, the portion between lateral and middle emarginate part is acute-angled. For comparison, L. nigrobilineatus female has an accessory gland directly opening at spermatheca, abdominal sternite VIII emarginate in the middle and not membranous-lobed, the portion between lateral and middle emarginate parts is obtuse-angled apically. Etymology. The specific name is derived from the type locality, Mainri (in Tibetan, Meili in Chinese), Yunnan Province , China . Distribution. China ( Yunnan ).