A taxonomic revision of the genus Sinotrisus Yin & Li (Coleoptera, Staphylinidae, Pselaphinae) Author Yin, Zi-Wei Author Nomura, Shuhei Author Li, Li-Zhen text ZooKeys 2012 205 45 57 http://dx.doi.org/10.3897/zookeys.205.3362 journal article http://dx.doi.org/10.3897/zookeys.205.3362 1313-2970-205-45 Sinotrisus nomurai Yin, Li & Zhao Fig. 3 Sinotrisus nomurai Yin, Li & Zhao, 2010: 251. Type material examined. Holotype, male, labeled 'China: Zhejiang Prov. / W. Tianmushan Mt. / firebreak / 01.v.2009, 1,400 m / Xiao-Bing SONG leg. // HOLOTYPE [ red] / Sinotrisus nomurai sp. n. / Yin and Li / det. 2010, SNUC' . Paratype, male, same label data as holotype, with the following label: 'PARATYPE [yellow] / Sinotrisus nomurai sp. n. / Yin and Li / det. 2012, SNUC' . Diagnosis . Vertex modified in the male. Antennomeres VII transverse. Pronotum lacking spines along discal ridges; basolateral foveae broad. Mesotibiae with one tiny and one long apical spur. Redescription. Male. Length 3.30. Head (Fig. 3A) wider than long, HL 0.57, HW 0.71; surface convex anterior and posterior to vertexal foveae, forming median angulate projection; with distinct occipital carinae; postocular margins evenly narrowed toward head base; antennomeres IV (Fig. 3B) smaller than VI, IX-X transverse, XI nearly oval, clubs indistinct. Pronotum about as long as wide, PL 0.66, PW 0.68; mediobasal impression longitudinally oval, lacking median antebasal fovea; paranotal carinae extending through length of prosternum. Elytra slightly wider than long, EL 1.06, EW 1.18; angulate at humeri. Mesotrochanters (Fig. 3C) with long ventral spine slightly curved toward base in apical half; mesotibiae with apical spur (Fig. 3D) longer than first tarsomeres; metatrochanters (Fig. 3E) with blunt triangular tubercle and large elongate protuberance at ventral side. Abdomen slightly wider than long, AL 0.96, AW 1.08; tergites and sternites V-VII with basolateral ridges successively shorter and thinner. Aedeagus (Figs 3 F-I ) well-sclerotized, length 0.42. Female. Unknown. Figure 3. Sinotrisus nomurai A Head and pronotum B antenna C mesotrochanter D apex of mesotibia E metatrochanter F aedeagus, in top view G same, in dorsal view H same, in lateral view I same, in ventral view. Scales (mm): A = 0.5; B = 0.3; C, D, E = 0.1; F, G, H, I = 0.2. Distribution. East China: Zhejiang. Host ant. Lasius sp.