Four new species of Scydmaeninae and Pselaphinae (Coleoptera: Staphylinidae) from Yunnan, China Author Li, Qi-Qi 0000-0003-0651-8401 Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai 200234, China. & 409429668 @ qq. com; https: // orcid. org / 0000 - 0003 - 0651 - 8401 409429668@qq.com Author Yin, Zi-Wei 0000-0001-6659-9448 Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai 200234, China. & pselaphinae @ gmail. com; https: // orcid. org / 0000 - 0001 - 6659 - 9448 pselaphinae@gmail.com text Zootaxa 2021 2021-01-27 4920 1 114 122 journal article 8651 10.11646/zootaxa.4920.1.5 6e8d5acc-6318-4e76-a10e-b13dba83c98b 1175-5326 4471693 9E967AD2-CF5E-4C7E-8ACA-DEEC544D0773 Tmesiphorus tanglimontis sp. nov. ( Fig. 3 ) Type material (3 exx.). Holotype : CHINA : Ƌ, labeled ‘ China : Yunnan , Lincang , Mt.Tangli , 24°01'18''N 99°14'20''E , 1758 m , 2020.ii.25 , with Odontotermes termites, sifted, Ji-Shen Wang leg., ủfflfiȏȑḿṫḗflŝḭffi’ ( SNUC ) . Paratypes : CHINA : 2 ♀♀ , same label data as holotype ( SNUC ) Diagnosis. Male. Body moderately stout, length approximately 2.10 mm ; antennal club well-formed by enlarged antennomeres 9–11, lacking modification; pronotal length/width approximately 0.93; elytral length/width approximately 0.51; aedeagus slender and symmetrical, oval; each paramere with four setae at apex. Female . Body length 2.07 mm ; antennae shorter than male. Description. Male ( Fig. 3A ). Body length 2.09 mm ; color red-brown, tarsi and mouthparts paler. Head ( Fig. 3B ) roundly triangular, approximately as long as wide, length from anterior margin of clypeus to base of vertex 0.35 mm , width across eyes 0.37 mm , with short, dense yellow setae; vertex with two asetose foveae, with short longitudinal carina between foveae, area around foveae shallowly impressed; with setose frontal fovea; eyes greatly prominent, each composed of about 50 facets; occiput broadly rounded, with tufts of dense setae; antennae ( Fig. 3A ) long and slender, length 1.54 mm ; antennomere 1 thick and elongate, antennomeres 2–8 each sub- moniliform, antennomere 9 enlarged, longer than wide, antennomere 10 shorter than 9, slightly longer than wide, antennomeres 11 longest, but shorter than 9 and 10 combined. Pronotum ( Fig. 3B ) slightly wider than long, length along midline 0.41 mm , maximum width 0.45 mm , broadest at apical two-fifths; sides anterior to middle rounded, narrowing anteriorly and posteriorly, anterior margin slightly emarginate medially, posterior margin slightly curved; disc roughly punctate, with setae similar to head, median and lateral antebasal foveae asetose. Elytra ( Fig. 3A ) much wider than long, length along suture 0.49 mm , maximum width 0.78 mm ; with distinct punctures; discal stria broadly impressed, extending posteriorly to approximately apical two-fifths of elytral length; posterior margin with row of dense setae. Legs elongate, lacking modification. Abdomen ( Fig. 3A ) slightly wider than elytra, length along midline 0.84 mm , maximum width 0.79 mm ; tergite 1 (IV) widest, basal sulcus filled with dense setae, with row of long setae along posterior margin, tergite 2 (V) longest, about twice as long as tergite 1 (IV), with densely setose basal sulcus, tergites 3 (VI) and 4 (VII) lacking setae in basal sulcus, tergite 3 (VI) about twice as long as tergite 7 (VII). Aedeagus ( Fig. 4C, D ) 0.26 mm long, strongly sclerotized; median lobe symmetrical, sub-elliptical dorso-ventrally, in lateral view tapering toward apex; parameres almost symmetrical, each paramere with two apical and two preapical setae; endophallus comprising single elongate sclerite. Female . External morphology similar to that of male, antennae shorter, antennomere 11 slightly smaller than male; each eye composed of about 50 facets. Measurements (as for male): body length 2.07 mm ; length/width of head 0.34–0.35/ 0.35–0.36 mm ; pronotum 0.42–0.44/ 0.44–0.45 mm ; elytra 0.46–0.49/ 0.76–0.78 mm ; abdomen 0.82–0.83/ 0.79–0.81 mm ; length of antenna 1.33 mm . Comments. The genus Tmesiphorus is a diverse group containing 74 species distributed in Africa (35 spp.), Asia (22 spp.), Australia (14 spp.), North America (2 spp.), and Oceania ( 1 sp. ) ( Inoue et al. 2019 ; Newton 2020 ). Among the Asian fauna, Tmesiphorus tanglimontis sp. nov. is distinct in the less greatly modified antennal clubs of the male, relatively short elytra, markedly long tergite 2 (V) in relation to tergite 1 (IV), and unique structure of the aedeagus. The new species differs from T . marani Löbl distributed in eastern Russia and North Korea ( Löbl 1963 ) by the smaller body size ( 2.10 mm vs. 3.4 mm ), distinctly shorter postocular margins, and median lobe of the aedeagus in lateral view lacking an apical projection; from T . okinawensis Inoue, Maruyama & Nomura recently described from Japan ( Inoue et al. 2019 ) by the much shorter setae of the body, deeper and broader discal striae of the elytra, and presence of long discal carinae on tergite 1 (IV) (discal carinae lacking in T . okinawensis ). Distribution. China : Yunnan . Etymology. The new species is named after the type locality of the new species, i.e. , Tangli Mountain.