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Five species of Unionicola Haldeman, 1842 (Acari: Hydrachnidia: Unionicolidae) were collected between 2018 and 2019. Notably, Unionicola (Armatax) armata Walter, 1929, previously unrecorded in China, is now documented for the first time in the country. Additionally, Unionicola newsumi Wiles, 1999 has been reclassified and assigned to the new subgenus Vespicola within the genus Unionicola Haldeman, 1842. These findings also led to the establishment of three new subgenera: Micronodusgen. nov., Vespicolagen. nov., and Lingshuiataxgen. nov. including four species: Unionicola soluplatussp. nov. U. jinisp. nov. U. caudipessp. nov. and U. armatallasp. nov. This marks the first description and documentation of these subgenera and species. [ABSTRACT FROM AUTHOR]

A brief introduction of Chinese Hygrobatidae taxonomy is reviewed. A new species, Sinibates xinyaoae Li, Smit & Guo sp. nov. from Hainan province is described representing a new genus Sinibates Li, Smit & Guo gen. nov. A second species, Hygrobates (Minibates) cf. dobriyali Pešić & Smit, 2019, from Hunan province represents a new subgenus, Minibates Li, Smit & Guo subgen. nov. inHygrobates. The other new species, Mixobates neoamurensis Li & Guo sp. nov. from Inner Mongolia Autonomous Region adds a newly recorded genus, Mixobates Thor, 1905 from China. Text: LSID Genus:Sinibates Li, Smit & Guo gen. nov.: LSID Species:Sinibates xinyaoae Li, Smit & Guo sp. nov.: LSID Subgenus:Minibates Li, Smit & Guo subgen. nov.: LSID Species:Mixobates neoamurensis Li & Guo sp. nov.: LSID [ABSTRACT FROM AUTHOR]

A brief introduction of Chinese Limnesiidae taxonomy is provided. Adults of two new species, Limnesia (Limnesia) lupingae Li & Guo sp. nov. and Limnesia (Limnesia) macrophthalma Li & Guo sp. nov., from Heilongjiang and Hubei provinces respectively, are described in detail. Subtle structures are recorded with scanning electron micrographs. In addition, deutonymphs of two new species are also described in detail and compared with the adults in discussion. [ABSTRACT FROM AUTHOR]