Taxonomic study on Sathytes Westwood (Coleoptera: Staphylinidae: Pselaphinae) from China. Part I Author Yin, Zi-Wei Author Li, Li-Zhen Author Zhao, Mei-Jun text Journal of Natural History 2012 2012-04-30 46 13 - 14 831 857 http://dx.doi.org/10.1080/00222933.2011.651651 journal article 10.1080/00222933.2011.651651 1464-5262 5199684 Sathytes longitrabis Yin and Li , sp. nov. ( Figures 1A , 3D , 4D , 7D , 8D ) Type material Holotype . Male , labelled ‘ CHINA : Shaanxi Prov. / Zhouzhi County / Houzhenzi / Qinling / Qinlingliangxia / N33.48.973 E107.44.483 // alt. 1820 m / 18 May 2008 / Hao HUANG and Wang XU leg.’. Description Male. Body ( Figure 1A ) reddish brown, mouthparts and tarsi lighter; BL 2.21. Head ( Figure 3D ) slightly wider than long, HL 0.43, HW 0.47. Vertexal foveae indistinct, anterior edge of foveae at level of posterior margin of eyes; LE: LP = 1.27: 1. Eyes moderately developed, prominent, each comprises about 20 facets. Antennae with scapes thick and large, pedicels longer than antennomeres III, III–VIII subequal, IX–XI ( Figure 4D ) strongly clubbed, IX ( Figure 7D ) much longer than wide, X much wider than long, XI with single basal protuberance covered with tuft of long apical setae. Pronotum slightly longer than wide, PL 0.55, PW 0.46. Elytra combined wider than long, EL 0.74, EW 0.89. Abdomen wider than long, AL 0.49, AW 0.78; tergite IV 2.5 times as long as next. Length of aedeagus ( Figure 8D ) 0.17. Female. Unknown. Habitat and distribution Sifted from the mixed leaf litter of a broad-leaved forest. Northwest China ( Shaanxi ). Etymology The specific name is combined from two Latin stems: “ long ”, meaning “elongate” and “ trab ”, meaning club, referring to the elongate male antennomere IX. Remarks The elongate and nearly cylindrical antennomere IX of the new species is shared only with S . clavatus , S . oculatus and S . tangliangi . Sathytes tangliangi is remotely related and placed in the group of species near S . montanus . Sathytes longitrabis can be separated from the remaining two by apophysis of antennomere IX being located apicomesally, while the apophysis of both S . clavatus and S . oculatus is located posterior to the middle. Sexual modification of antennomere XI in S . longitrabis is formed by a single short protuberance, whereas in S . clavatus it is formed by a small blade-like piece and in S . oculatus by a short curved semi-membranous apophysis.