Two new cave-adapted pseudoscorpion species belonging to the family Chthoniidae are described: Tyrannochthonius pandussp. nov. from Biyu Cave (Yunnan: Luxi) and Lagynochthonius laoxueyanensissp. nov. from Laoxueyan Cave (Yunnan: Yanshan). Both of them, collected from the dark zone of caves, are highly troglomorphic species.
Eleven new Lagynochthonius species from twelve karst caves of eastern Yunnan are described, including detailed diagnosis and illustrations: L. crassus sp. nov. from Unnamed Cave 1 (Maguan County), L. fengi sp. nov. from Unnamed Cave 2 (Yanjin County), L. magnidentatus sp. nov. from Xiao Cave (Fuyuan County), L. minimus sp. nov. from Yanfen Cave and Cizhu Cave (Xichou County), L. retrorsus sp. nov. from Qinglong Cave (Daguan County), L. serratus sp. nov. from Unnamed Cave 3 (Malipo County), L. spinulentus sp. nov. from Yingshan Cave (Zhenxiong County), L. xiaolinensis sp. nov. from Dayan Cave (Zhenxiong County), L. xibaiensis sp. nov. from Hama Cave (Zhenxiong County), L. xinjiaoensis sp. nov. from Yueliang Cave (Fuyuan County), L. yaowangguensis sp. nov. from Unnamed Cave 4 (Malipo County). An identification key to all known Lagynochthonius species from China is also provided.
Four new troglomorphic pseudotyrannochthoniid pseudoscorpion species collected from karst caves in Guizhou Province are described with detailed diagnoses and illustrations: Allochthonius bainiensissp. nov. from Liangfeng Cave (Xishui County), Allochthonius pandussp. nov. from Daozuo Cave (Xishui County), Allochthonius xinqiaoensissp. nov. from Sanjie Cave (Fenggang County), and Spelaeochthonius wulibeiensissp. nov. from Wulibei Cave (Weining County). Spelaeochthonius wulibeiensissp. nov. represents the first record of the genus in China. The diagnostic features of these four new cave-adapted (troglomorphic) species are presented and discussed, as well as compared with closely related species. The data on their distribution, habitat and ecology of the species are also given.
Twenty-four new Tyrannochthonius species from twenty-eight karst caves of Guizhou are described, including detailed diagnosis and illustrations: T. acutus sp. nov. from Gazuida Cave (Kaili City), T. altus sp. nov. from Shenren Cave (Hezhang County), T. arificus sp. nov. from Hei Cave (Anlong County), T. babaowanensis sp. nov. from Babaowan Cave (Yinjiang County), T. breviculus sp. nov. from Yanjia Cave (Libo County), T. brevispinus sp. nov. from Jingua Cave (Danzhai County), T. duo sp. nov. from Liangfeng Cave (Jiangkou County), T. gracilis sp. nov. from Xianren Cave (Hezhang County), T. hispidus sp. nov. from Qilin Cave (Jianhe County), T. infirmus sp. nov. from Liujiadadong Cave (Pu’an County), T. latus sp. nov. from Zimu Cave (Panzhou City), T. maculosus sp. nov. from Daxiao Cave (Xingren City), T. multicavus sp. nov. from Xiaohui Cave & Weier Cave (Pingtang County) and Da Cave & Qixia Cave (Luodian County), T. multidentatus sp. nov. from Guanyin Cave (Fenggang County) and Anjialin Cave (Sinan County), T. nanxingensis sp. nov. from Feng Cave (Panzhou City), T. oblongus sp. nov. from Houzi Cave (Huaxi District), T. parcidentatus sp. nov. from Daniu Cave (Dafang County), T. pictus sp. nov. from Gaoluo Cave and Cangjun Cave (Dushan County), T. pinguis sp. nov. from Zharou Cave (Ziyun County), T. planus sp. nov. from Yanggong Cave (Sandu County), T. qilinensis sp. nov. from Qilin Cave (Jianhe County), T. quattuor sp. nov. from Guanjiadadong Cave (Dafang County), T. umidus sp. nov. from Da Cave (Wudang District), and T. yanshanensis sp. nov. from Yanshan Cave (Wuchuan County). An identification key to all known Tyrannochthonius species from China is also provided.
Three new cave-adapted chthoniid pseudoscorpions from four karst caves of Yunnan Province (China) are described, including detailed diagnosis and illustrations: Tyrannochthonius calvatussp. nov. from an unnamed cave and Dongtianfu Cave (Fuyuan County), T. capitosp. nov. from Xianren Cave (Xichou County), and Lagynochthonius daidaiensissp. nov. from Daidai Cave (Qiubei County). All three species are endemic to Yunnan. Tyrannochthonius calvatussp. nov., lacking the carapaceal antero-median setae and having intercalary teeth on the movable chelal finger only, is a peculiar chthoniid species.
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