Article

A new cave-dwelling species of Lagynochthonius (Arachnida: Pseudoscorpiones: Chthoniidae) from Yunnan Province, China

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Abstract

A new pseudoscorpion, Lagynochthonius bailongtanensis sp. nov., is described and illustrated from specimens collected in a cave in Luoping County, Yunnan Province, China. This species is notable in being strongly troglomorphic. A new identification key is provided to all known Chinese representatives of the genus Lagynochthonius.

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... Of these eight species, except for L. typhlus, L. curvidigitatus, L. bailongtanensis and L. laoxueyanensis, the other four species retain eyes or eyespots and are weakly troglomorphic. It is worth mentioning that L. curvidigitatus can be easily separated from other new species described in this paper by its strongly curved chelal fingers (Fig. 1;Mahnert 1988;Harvey 1989;Muchmore 1991;Mahnert 1997;Judson 2007;Li et al. 2019;Harms et al. 2022;Hou et al. 2022;World Pseudoscorpiones Catalog 2022). ...
... times longer than broad vs. 6.3-6.6 times in females, chela length 1.55-1.60 vs. 1.19-1.32 mm in females), the presence of more chelal teeth, and a larger body size (body length 1.95-2.01 vs. 1.60 mm in females) (Judson 2007;Li et al. 2019;Hou et al. 2022). ...
... nov. can be distinguished from L. laoxueyanensis by the presence of intercalary teeth on both chelal fingers, the number of setae on tergites Ⅲ and Ⅳ (2 and 2, respectively vs. 4 and 4, respectively), and a larger body size (body length 2.07-2.10 vs. 1.78 mm in males) (Li et al. 2019;Hou et al. 2022). ...
Article
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.
... To date, 33 cave-dwelling pseudoscorpion species, representing three families (Chthoniidae, Neobisiidae, Chernetidae), have been described from China. Among them, eight species are known from Yunnan (Schawaller 1995;Mahnert 2003Mahnert , 2009Mahnert and Li 2016;Gao et al. 2017;Li et al. 2017;Gao et al. 2018;Li et al. 2019;Feng et al. 2020;Gao et al. 2020;Zhang et al. 2020). ...
... At present, this genus contains 55 species (seven species living in caves) distributed in Asia, Australia, Africa and America. Eight species of this genus have been described from China, of which only one is exclusively known from karst caves: L. bailongtanensis Li, Liu & Shi, 2019from Yunnan (Li et al. 2019WPC 2022). ...
... can be easily separated from L. curvidigitatus by the presence of a pair of curved chelal fingers in the latter and the number of setae on tergites I-II (L. laoxueyanensis with 2 and 2 setae, respectively, but L. curvidigitatus with 3 and 4 setae, respectively) (Muchmore 1991;Mahnert 1997;Edward and Harvey 2008;Mahnert 2011;Li et al. 2019). ...
Article
Full-text available
Two new cave-adapted pseudoscorpion species belonging to the family Chthoniidae are described: Tyrannochthonius pandus sp. nov. from Biyu Cave (Yunnan: Luxi) and Lagynochthonius laoxueyanensis sp. nov. from Laoxueyan Cave (Yunnan: Yanshan). Both of them, collected from the dark zone of caves, are highly troglomorphic species.
... Meanwhile they are also the prey of spiders, centipedes and other animals. To date, six cave-dwelling pseudoscorpion species belonging to the families Neobisiidae, Chernetidae and Chthoniidae have been found in Yunnan (Mahnert 2003;Li et al. 2017;Li et al. 2019). ...
... At present, 31 cave-dwelling pseudoscorpion species have been described from China, including the two new species reported in this study. Among them, Neobisiidae accounts for 64.5%, Chthoniidae and Chernetidae account for 22.6% and 12.9% respectively (Mahnert 2003(Mahnert , 2009Mahnert & Li 2016;Gao & Zhang 2017;Gao et al. 2018;Li et al. 2017Li et al. , 2019Feng et al. 2019Feng et al. , 2020. Fewer chthoniids and chernetids are reported probably because they are much smaller and difficult to detect. ...
Article
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Two new species of troglomorphic pseudoscorpions of the family Neobisiidae, collected from karst caves in Yunnan, China, are described: Parobisium laevigatum sp. n. and P. muchonggouense sp. n.. A key to the Parobisium species from China is also provided.
... Since 2017, 39 new subterranean-adapted species across several taxonomic arthropod groups have been described (Gao et al. 2017;Huang et al. 2017;Li and Wang 2017;Song et al. 2017;Tian et al. 2017Tian et al. , 2018Deuve and Tian 2018;Li et al. 2019a). Overall, at least 382 cave-dwelling arthropod species are now known from this region (Ran and Yang 2015;Tian et al. 2016;Li and Wang 2017;Gao et al. 2018;Feng et al. 2019;Li et al. 2019b;Liu and Wynne 2019). Incidentally, this work has also resulted in the identi cation of at least 21 troglomorphic pseudoscorpion species (refer to Feng et al. 2019;Li et al. 2019b). ...
... Overall, at least 382 cave-dwelling arthropod species are now known from this region (Ran and Yang 2015;Tian et al. 2016;Li and Wang 2017;Gao et al. 2018;Feng et al. 2019;Li et al. 2019b;Liu and Wynne 2019). Incidentally, this work has also resulted in the identi cation of at least 21 troglomorphic pseudoscorpion species (refer to Feng et al. 2019;Li et al. 2019b). ...
Article
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We summarize and discuss the 29 known cave-dwelling pseudoscorpion species from China. Four new troglomorphic pseudoscorpion species, Parobisium motianense sp. nov., P. qiangzhuang sp. nov., P. san- louense sp. nov., and P. tiani sp. nov., belonging to the family Neobisiidae, are described based on speci- mens collected in karst caves in Guizhou, China. Detailed diagnosis, descriptions, and illustrations are presented. We also provide recommendations for management of caves where they occur, as well as the cave arthropod communities and the habitats that support them.
... comm.). Among them, four genera and 17 species are known from China (Schawaller, 1995;Harvey, 2013;Gao et al., 2018;Li et al., 2019). Members of this family are typically found in leaf litter, soil, under rocks and stones, but many species are also troglobitic and found in caves and karst systems across the world (Harvey, 2013). ...
Article
Two new troglomorphic pseudoscorpion species, Tyrannochthonius harveyi, sp. nov. and Tyrannochthonius zhai, sp. nov., are described from the dark zone of caves in the tower karst of the Guizhou Province in China. Both species are presently known only from single caves and are likely to have very restricted distribution ranges.
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