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 bilineatus (Wittmer, 1995) Figs 6A-C , 13A , 17A Athemus (Isathemus) bilineatus Wittmer, 1995: 275, figs 140, 141. Athemus (s.str.) amplus Wittmer, 1995: 278, figs 146, 147, 203. Lycocerus amplus : Kazantsev and Brancucci 2007 : 249. Synonymized by Yang et al. 2013 : 10, fig. 8. Lycocerus bilineatus : Kazantsev and Brancucci 2007 : 249; Yang et al. 2013 : 10, fig. 7. Type material examined. See Yang et al. (2013) . Non-type material examined. China: 2♂, 1♀ (IZAS), Jiangxi, date and collector unknown; 1♀ (IZAS), Shanghai, 1947, leg. Marist Brothers. Descriptive notes. Male. Aedeagus: basal piece feebly longer than dorsal plate of each paramere (Fig. 6A-C ); ventral process of each paramere stout and obviously bent inwards apically in ventral view (Fig. 6A ), inclining ventrally in lateral view (Fig. 5C ); dorsal plates of parameres obviously longer than ventral processes (Fig. 5A, C ), with apical margins rounded (Fig. 5B ); laterophyse feebly longer than ventral process, with apices acute and directing dorso-outwards (Fig. 5A, C ). Figure 6. Aedeagus A-C Lycocerus bilineatus (Wittmer, 1995) D-F L. jelineki ( Svihla , 2004) A, D ventral view B, E dorsal view C, F lateral view. Scale bars: 1.0 mm. Female. Internal organ of reproductive system (Fig. 13A ): spermatheca feebly longer than diverticulum; accessory gland nearly as long as spermatheca. Abdominal sternite VIII (Fig. 17A ): triangular emarginations in middle and on both sides of posterior margin, lateral emarginations obviously deeper and wider than the middle one, the portion between lateral and middle emarginations wide and right-angled at apices, obviously extending over apices of latero-apical angles, which are narrowly rounded. Distribution. China (Jiangsu, Shanghai, Jiangxi, Hubei). Remarks. The aedeagus of this species was illustrated only in ventral and lateral views by Wittmer (1995) . Herein, the aedeagus is illustrated in ventral, dorsal, and lateral views, and the female internal genitalia is illustrated for the first time.