Three new species of bat-parasitic gamasid mites of the genera Spinturnix, Macronyssus and Steatonyssus (Acari: Mesostigmata: Spinturnicidae, Macronyssidae) from Siberia and Mongolia, with keys to species of Russia and adjacent countries Author Orlova, Maria V. . Tyumen State Medical University, Odesskaya str. 54, Tyumen, 625023 Russia; E-mail: masha _ orlova @ mail. ru 2. National Research Tomsk State University, Lenina str. 36, Tomsk, 634050 Russia. masha_orlova@mail.ru2.NationalResearchTomskStateUniversity,Leninastr.36,Tomsk,634050Russia. Author Anisimov, Nikolay V. . Tyumen State University, Volodarskogo str. 6, Tyumen, 625004, Russia; E-mail: bioanv @ gmail. com bioanv@gmail.com text Persian Journal of Acarology 2023 2023-04-15 12 2 211 239 journal article 10.22073/pja.v12i2.76740 2251-8169 85ECC57C-CD02-4348-8560-9D4F845EE850 Key to species of the genus Spinturnix of Russia and adjacent countries (females) 1. Sternal shield rounded, with one pair of setae ................................. Spinturnix senkevitchi sp. nov. – Sternal shield drop-shaped or pentagonal, without setae or with three pairs of setae .................... 2 2. With 3–7 pairs of dorsal setae posterior to stigmata ...................................................................... 3 – With more than 20 dorsal setae posterior to stigmata .................................................................... 5 3. With 6–7 pairs of dorsal setae posterior to stigmata; lanceolate seta on dorsal tip of tarsi II–IV present ...................................................................................................... S. plecotina (Koch, 1839) – With 3–4 pairs of dorsal setae; lanceolate seta on tarsi II–IV absent.............................................. 4 4. Two pairs of long setae and two pairs of short setae at the end of dorsal opisthosoma; tritosternum discoidal ............................................................................................. S. kolenatii Oudemans, 1910 – Three pairs of short setae on at the end of dorsal opisthosoma; tritosternum jar-shaped ................ .................................................................................................................... S. bakeri Rudnick, 1960 5. With less than 50 dorsal setae posterior to stigmata ...................................................................... 6 – With more than 50 dorsal setae posterior to stigmata .................................................................. 11 6. Tritosternum is large, mushroom-shaped; some dorsal setae of legs I–II serrated .......................... ....................................................................................................................... S. psi (Kolenati, 1856) – Tritosternum not mushroom-shaped or small and difficult to observe; setae of legs I-II are smooth ......................................................................................................................................................... 7 7. With 40 or more dorsal setae .......................................................................................................... 8 – With less than 40 dorsal setae ........................................................................................................ 9 8. Sternal shield with a pattern of large-sized cells, with three pairs of setae; tritosternum difficult to observe ....................................................................................... S. bregetovae Stanyukovich, 1995 – Sternal shield with small reticulate pattern, lacking setae; tritosternum distinct, small and rounded ..................................................................... S. acuminata helvetiae Deunff, Keller & Aellen, 1986 9. Dorsal shield diamond-shaped, rounded; posterior margin of sternal shield rounded ..................... ............................................................................ S. nobleti Deunff, Volleth, Keller & Aellen, 1990 – Dorsal shield ovate; posterior margin of sternal shield almost straight ....................................... 10 10. Anterior and posterior ends of dorsal shield with a large rounded projection each; podosomal setae about two times shorter than opisthosomal setae..... S. acuminata acuminata (Koch, 1836) – Dorsal shield with a single large anterior rounded projection, smoothly narrowed posteriorly; podosomal setae and opisthosomal seta subequal ........................ S. punctata (Sundevall, 1833) 11. Sternal shield pentagonal ...................................................... S. maedai Uchikawa & Wada, 1979 – Sternal shield drop-shaped ......................................................................................................... 12 12. Genital setae off genital shield; dorsal setae 90–130 ................................................................. 13 – Genital setae on genital shield; dorsal setae 70–90 .................................................................... 14 13. Dorsal opisthosomal setae 100–130, dorsal shield large (more than 800 µm) .............................. ................................................................................................................ S. myoti (Kolenati, 1856) – Dorsal opisthosomal setae 80–100, dorsal shield small (less than 800 µm) .................................. ......................................................................... S. uchikawai Orlova, Zhigalin & Zhigalina, 2015 14. Marginal dorsal opisthosomal setae longer than other opisthosomal setae; tritosternum distinct ....................................................................................................... S. emarginata (Kolenati, 1856) – Marginal dorsal opisthosomal setae subequal to other opisthosomal setae ................................... .......................................................................................................... S. mystacin (Kolenati, 1857)