Review of the Lycocerus pallidulus group (Coleoptera, Cantharidae), with descriptions of six new species from China Author Wang, Younan 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 Liu, Haoyu https://orcid.org/0000-0003-1383-5560 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@aliyun.com Author Yang, Xingke https://orcid.org/0000-0003-3676-6828 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China Author Yang, Yuxia https://orcid.org/0000-0002-3118-6659 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 yuxia0305@126.com text ZooKeys 2023 2023-08-29 1176 243 285 http://dx.doi.org/10.3897/zookeys.1176.107858 journal article http://dx.doi.org/10.3897/zookeys.1176.107858 1313-2970-1176-243 0EC468730B9C484C880371C49D89925F 77FF8CD616995BD6BB50F52F16CFAF44 Lycocerus maoershanensis Y. Yang, Liu & X. Yang sp. nov. Figs 9A-C , 13C , 17C , 19A, B Type material. Holotype : ♂ (IZAS), China, Guangxi, Maoershan, 1900 m, 14.VII.1985, leg. S. B. Liao. Paratypes : China: 1♂, 1♀ (IZAS), same data as holotype; 1♀ (IZAS), same locality as holotype, 1950 m, 14.VII.1985, leg. S. M. Song. Diagnosis. Although the new species is similar to L. laterophysus sp. nov. in the bicolored head, it is more related to L. zdeneki on basis of the structure of aedeagus. Further, L. maoershanensis sp. nov. can be distinguished from the latter in the following characters: scutellum dark brown; female abdominal sternite VIII (Fig. 17C ) with the portion between lateral and middle emarginations rounded at apices, which obviously extending over latero-apical angles. In comparison, L. zdeneki has yellow scutellum; female abdominal sternite VIII (Fig. 16F ) with the portion between lateral and middle emarginations feebly extending over latero-apical angles. Description. Male (Fig. 19A ). Head, prothorax and legs yellowish orange, vertex with a small triangular dark brown marking, mandibles dark brown at apices, antennomeres III-XI black, pronotum with two dark brown irregular markings near middle of anterior and posterior margins, scutellum black, elytra pale yellow and almost transparent, legs more or less darkened at tarsi, apices of tibiae and femora, meso- and metasterna and abdomen black. Body densely covered with yellow recumbent pubescence. Head feebly narrowed behind eyes, surface densely and finely punctate; eyes moderately large and protruding, head width across eyes slightly wider than anterior margin of pronotum; antennae filiform, extending to three-fifths of elytra when reclined, antennomere II shortest, ~ 1.5 x longer than wide at apex, III-VI feebly widened apically, IV-XI each with a short smooth impression near basal part of outer margin, VII-XI nearly parallel-sided, VIII longest. Pronotum subquadrate, slightly longer than wide, anterior margin feebly arcuate, lateral margins subparallel, posterior margin nearly straight, anterior angles rounded, posterior angles obtuse-angled, disc convex on posterolateral parts, surface finely and feebly sparsely punctate than that on head. Elytra ~ 3.75 x longer than pronotum, 5.0 x longer than width across humeri, outer margins nearly parallel, disc semi-lustrous, coarsely and densely punctate. Legs slender, fore and middle legs with a digitiform tooth on each anterior claw, and hind claws simple. Aedeagus: basal piece slightly longer than dorsal plate of each paramere (Fig. 9A-C ); ventral process of each paramere slender, feebly bent inwards and approaching to each other in ventral view (Fig. 9A ), inclining ventrally in lateral view (Fig. 9C ); dorsal plates of parameres slightly longer than ventral processes (Fig. 9A, C ), with inner margins emarginate at apical parts, outer margins slightly converging apically, apical margins slightly arcuate and descending inwards, inner apical angle acute angled and outer angle rounded in dorsal view (Fig. 9B ); laterophyse feebly longer than ventral process, with apices acute and directing dorso-inwards in ventral view (Fig. 9A ). Figure 9. Aedeagus A-C Lycocerus maoershanensis sp. nov. D-F L. putzimimus sp. nov. A, D ventral view B, E dorsal view C, F lateral view. Scale bars: 1.0 mm. Female (Fig. 19B ). Similar to the males, but eyes less protruding, antennae shorter and extending to basal third length of elytra when reclined, middle antennomeres without impressions, pronotum nearly as long as wide, fore and middle legs with a digitiform tooth on each anterior and posterior claw. Internal organ of reproductive system (Fig. 13C ): spermatheca nearly as long as diverticulum; accessory gland nearly as long as spermatheca. Abdominal sternite VIII (Fig. 17C ): subrounded emarginations in middle and on both sides of posterior margin, lateral emarginations deeper than and as wide as the middle one, the portions between lateral and middle emarginations moderately wide and rounded at apices, obviously extending over apices of latero-apical angles, which are narrowly triangular. Body length: 9.0-10.0 mm (9.1 mm in holotype); width: 1.7-2.3 mm (1.8 mm in holotype). Distribution. China (Guangxi). Etymology. The specific name is derived from the name of the type locality, Maoershan, Guangxi, China.