A Taxonomic Study Of The Subgenus Tachinoderus(Coleoptera:Staphylinidae:Tachyporinae)from China

Members of the subgenus Tachinoderus Motschulsky(Coleoptera: Staphylinidae: Tachyporinae: Tachinus)are small body size predatory beetles,commonly found in leaf litter near creek.Prior to this study,the subgenus Tachinoderus Motschulsky include 45 species distributed in the eastern Palaearctic and Oriental regions,with a single species occurring in North America.Based on an examination of over 1600 specimens,the author conducted a systematic study on the Chinese species of Tachinoderus.The results are as follows:1.Seventeen new species of Tachinoderus are recognized,which includes: 6 new species are of the longicornis-group: T.bilobus Chang,Li & Yin,2019(China: Hubei,Sichuan),T.centralis Chang,Li,Yin & Schülke,2019(China: Shaanxi,Hubei,Chongqing,Sichuan),T.curvipennis Chang,Li & Yin,2019(China: Hubei),T.lobutulus Chang,Li & Yin,2019(China: Yunnan),T.motuoensis Chang,Li & Yin,2019(China: Xizang),and T.tangliangi Chang,Li,Yin & Schülke,2019(China: Yunnan;Thailand);11 new species of the nepalensis-group: T.asperius Chang,Li & Yin,2019(China: Yunnan),T.biangulatus Chang,Li,Yin & Schülke,2019(China: Shaanxi,Sichuan),T.bimorphus Chang,Li,Yin & Schülke,2019(China: Yunnan,Xizang),T.breviculus Chang,Li,Yin & Schülke,2019(China: Sichuan,Yunnan),T.chengzhifeii Chang,Li,Yin & Schülke,2019(China: Shaanxi,Zhejiang,Hubei,Guangxi,Fujian,Chongqing,Sichuan,Yunnan),T.granosus Chang,Li,Yin & Schülke,2019(China: Shaanxi,Gansu,Sichuan),T.maculosus Chang,Li,Yin & Schülke,2019(China: Yunnan),T.meniscus Chang,Li,Yin & Schülke,2019(China: Hunan,Guangdong,Guangxi,Yunnan),T.qian Chang,Li & Yin,2019(Guizhou),T.songxiaobini Chang,Li & Yin,2019(China: Yunnan),and T.yunnanensis Chang,Li,Yin & Schülke,2019(China: Yunnan;Laos);and a new country record: T.laosensis Katayama & Li,2008(China: Shaanxi,Zhejiang,Hubei,Jiangxi,Fujian,Guangxi,Chongqing,Sichuan,Guizhou,Yunnan;Vietnam;Laos).2.The differences between similar species are discussed in detail.Photo plates of habitus and major diagnostic characters for all species are given.3.A database containing information of all taxonomic information of the subgenus Tachinoderus is built.4.A key to world species of Tachinoderus is presented.5.The domestic distribution of Tachinoderus is mapped,and geographic region analyzed.6.A list of world Tachinoderus species is provided.