Contribution to the knowledge of the ptyctimous mite genus Austrophthiracarus (Acari, Oribatida, Steganacaridae) with descriptions of two new species from China Author Liu, Dong Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, P. R. China. liudong @ iga. ac. cn; https: // orcid. org / 0000 - 0001 - 5009 - 2466 & College of Earth Sciences, Jilin University, Changchun 130061, P. R. China text Zootaxa 2020 2020-05-29 4786 1 138 144 journal article 21789 10.11646/zootaxa.4786.1.11 d2c81be2-c2db-46fd-9ef0-8aead44bae71 1175-5326 3864949 EAE886C7-854B-47BF-BE92-667FB2417EEA Key to species of Austrophthiracarus known from China 1 Notogaster with 17 pairs of setae; c 1 > c 1 – d 1 ................................................................. 2 - Notogaster with 16 pairs of setae; c 1 < c 1 – d 1 ................................................................. 3 2 Sensilli bacilliform with thin and smooth head; lamellar setae thick, flagellate distally and strongly curved inward in distal half; setae d of femora I situated near distal end of article................................ A. longisetosus Liu & Chen, 2014 - Sensilli setiform, tapering distally; lamellar setae thin, spiniform but not curved inward in distal half; setae d of femora I situated far from distal end of segment................................................. A. paralongisetosus sp. nov. 3 Interlamellar setae long and thick; sensilli bacilliform, nearly equally thick in whole length; vestigial setae f 1 anterior to setae h 1 ................................................................................ A. bacilliformis sp. nov. - Interlamellar setae short and fine; sensilli setiform, tapering distally; vestigial setae f 1 posterior to setae h 1 ............... 4 4 Lateral carinae of prodorsum absent; lamellar setae thick; exobothridial setae vestigial; formula of genital setae 7(4+3): 2..................................................................................... A. setiformis Liu, 2017 - Lateral carinae of prodorsum present; lamellar setae fine; exobothridial setae not vestigial; formula of genital setae 6(4+2): 3........................................................................... A. filiformis Liu & Chen, 2014