First record of Athyreacaridae (Acari: Heterostigmata) from Asia with description of two new species of Athyreacarus from India and Sri Lanka Author Khaustov, Alexander A. Tyumen State University, Tyumen, 6 Volodarskogo Str., 625003 Russia (e-mail: alex 1973 khaustov @ gmail. com) alex 1973 khaustov @ gmail. com; https: // orcid. org / 0000 - 0002 - 0306 - 112 X Author Frolov, Andrey V. Zoological Institute of Russian Academy of Sciences, Universitetskaya Embankment 1, 199034, Saint Petersburg, Russia frolov @ scarabaeoidea. com; text Zootaxa 2020 2020-05-19 4779 2 260 272 journal article 22028 10.11646/zootaxa.4779.2.7 aba71a8b-878a-4b8e-ac64-3b8b97cb3e5b 1175-5326 3833553 4EDD2539-6E9F-401D-B2DA-BEF7601E249E Key to females of world species of Athyreacarus (based on Khaustov & Frolov 2019 ) 1. With two pairs of cheliceral setae ( cha , chb )............................................................... 2 - With one pair of cheliceral setae ( cha )..................................................................... 6 2. With three pairs of aggenital setae........................................................................ 3 - With two pairs of aggenital setae............................................. A . latus Khaustov and Frolov, 2019 3. Dorsal and ventral idiosomal setae not thickened in basal part, at least some dorsal idiosomal setae very long; cheliceral stylets without subapical tooth; tergites D, EF and H without scale-like microsculpture................................... 4 - Most dorsal and ventral idiosomal setae thickened in basal part, all dorsal idiosomal setae short; cheliceral stylets with subapical tooth; tergites D, EF and H with scale-like microsculpture................................ A. brevisetosus sp. nov. 4. Prodorsal shield with lateral projections; cupules on tergites D and EF not visible.................................. 5 - Prodorsal shield without lateral projections; cupules on tergites D and EF well developed................................................................................................ A . primitivus Khaustov and Frolov, 2017 5. Setae sc 1 distinct, at least 6 in length; ap1 narrow, almost as wide as ap2.......... A . angustus Khaustov and Frolov, 2019 - Only alveoli of setae sc 1 present; ap1 wide, much wider than ap2.................. P . ovalis Khaustov and Frolov, 2019 6. Setae c 1 absent, setae v 2 vestigial; setae sc 2 , c 2 , d and f shorter than greatly attenuated ps 1,2 ........................... 7 - Setae c 1 present, setae v 2 well developed; setae sc 2 , c 2 , d and f ultralong, exceeding setae ps 1,2 in length................. 8 7. Setae sc 2 , c 2 , d , f , h 1 , and h 2 with distinctly thickened basal half; setae e very short, spiniform; dimples on segment ps small, similar to dimples on tergite H and aggenital plate............................. A. grandis Khaustov and Frolov, 2019 - Setae sc 2 , c 2 , d , f , h 1 , and h 2 not thickened; setae e well developed, filiform; dimples on segment ps large, distinctly larger than dimples on tergite H and aggenital plate......................... A . pleiotretus Lindquist, Kaliszewski and Rack, 1990 8. At least alveoli of setae sc 1 present; cupules ih present; setae ag 1 distinctly blunt-ended............................. 9 - Setae sc 1 completely absent; cupules ih absent; setae ag 1 pointed................................. A. indicus sp. nov. 9. With two pairs of aggenital setae........................................................................ 10 - With three pairs of aggenital setae....................................................................... 11 10. Setae c 2 about 10 times longer than c 1 ; most of dorsal and ventral idiosomal setae pointed; length of idiosoma 420-450........................................................................ A. vazdemelloi Khaustov and Frolov, 2019 - Setae c 2 at most three times longer than c 1 ; most of dorsal and ventral idiosomal setae blunt-ended; length of idiosoma 240- 270.................................................................. A . pusillus Khaustov and Frolov, 2019 11. At least setae tc” on tarsi II and III with spatulate tips; apodeme 3 well separated from apodeme 4 on either side........ 12 - All setae on tarsi II and III with pointed tips, none with spatulate tips; apodeme 3 nearly contiguous with apodeme 4 on either side................................................................... A. similis Khaustov and Frolov, 2019 12. Setae tc’ on tarsi II and III with distinctly spatulate tips; dimples of idiosomal plates relatively large, sparsely distributed; length of idiosoma 440-465.................................................. A. magnificus Khaustov and Frolov, 2019 - Setae tc’ on tarsi II and III with pointed tips; dimples of idiosomal plates very small, densely distributed; length of idiosoma 305-405.............................................................. A . variabilis Khaustov and Frolov, 2019