Fifteen new species of Sathytes Westwood from China (Coleoptera, Staphylinidae, Pselaphinae), with an updated checklist of world species Author Yin, Zi-Wei C515106C-5782-4471-AE11-483B49606A67 Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai 200234, China. pselaphinae@gmail.com Author Shen, Qi 195E5F86-BD32-45F2-BF46-014394EF380F Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai 200234, China. 2974259092@qq.com text European Journal of Taxonomy 2020 2020-10-26 722 37 74 journal article 10.5852/ejt.2020.722.1133 4134339 B9393832-6F0C-4649-AF54-CAAF43234326 Sathytes nujiangensis sp. nov. urn:lsid:zoobank.org:act: 2E5BC920-834F-42DC-9FB4-99550406183F Fig. 9 Differential diagnosis The male of S. nujiangensis sp. nov. is morphologically similar to that of S . transversus sp. nov. ( China : Xizang ), S . valentulus sp. nov. ( China : Guangxi ) and S . usitatus Yin & Li, 2012 ( China : Yunnan ) in the presence of a single basal protuberance of antennomere 11, and the markedly transverse antennomere 9 (when widths are fully visible). It can be separated from S . transversus sp. nov. by the much smaller body size ( 2.17 mm vs 2.61–2.72 mm ) and less protuberant mesal margin of antennomere 9; from S . valentulus sp. nov. by the thinner antennomere 11 each with a relatively longer basal protuberance, and more transverse antennomere 9; and from S . usitatus by the more oblique anterior margin of antennomere 9 and the more medial positions of the apophyses on these antennomeres. Etymology The new species is named after Nu Jiang, where the type locality of this species is situated. Type material ( 1 specimen ) Holotype CHINA • ♂ ; Yunnan , Gongshan Dulong Nu Autonomous Co. ( ĤƜẘAERȃRoḿn ), Qiutan Vil. ( DZḀLj ), Langwang Temple ( ÑḢử ); 28°04′24.60″ N , 98°34′45.73″ E ; alt. 1510 m ; 28 Jul. 2015 ; Wen-Xuan Bi leg.; SNUC . Fig. 9. Sathytes nujiangensis sp. nov. , ♂. A . Dorsal habitus. B . Antennal club. C . Antennomere 9. D . Modification of antennomere 11, enlarged. E . Aedeagus, ventral view. Scale bars: A = 0.5 mm; B = 0.2 mm; C, E = 0.1 mm; D = 0.05 mm. Description Male MEASUREMENTS. AeL = 0.24 mm ; AnL = 1.12 mm ; AL = 0.53 mm ; AW = 0.67 mm ; TBL = 2.17 mm ; EL = 0.65 mm ; EW = 0.77 mm ; HL = 0.48 mm ; HW = 0.46 mm ; LE = 0.16 mm ; LT = 0.13 mm ; PL = 0.51 mm ; PW = 0.49 mm . Body ( Fig. 9A ) reddish-brown, mouthparts and tarsi paler. Head slightly longer than wide. Each eye composed of about 20 facets; LE:LT = 1.2. Antennal clubs ( Fig. 9B ) formed by antennomeres 9–11; antennomere 9 ( Fig. 9C ) strongly transverse, broadest at apical ¼, each with semi-membranous apophysis at apex of expansion, and at approximately apical ¼ of mesal margin; antennomere 10 strongly transverse, obconical; antennomere 11 ( Fig. 9B ) about 1.5 times as long as wide, each with single apically truncate basal protuberance bearing tuft of long setae at the apex. ( Fig. 9D ). Pronotum slightly longer than broad. Elytra moderately transverse. Abdomen widest at tergite 1 (IV) and narrowing apically. Aedeagus ( Fig. 9E ) slightly elongate, slightly constricted at middle and almost symmetrical. Female Unknown. Distribution China : Yunnan .