A new species and new records of the genus Eustigmaeus (Acari: Prostigmata: Stigmaeidae) from Western Siberia Author Khaustov, Alexander A. Author Tolstikov, Andrei V. text Zootaxa 2014 3861 6 531 553 journal article 10.11646/zootaxa.3861.6.2 fb954baf-d5f6-4290-b872-a469fb8a157e 1175-5326 226041 3316AC78-A115-4F2E-9DDD-25F266FC114D Key to species of the genus Eustigmaeus of Russia (females) 1. 1–2 pairs of callosities present between idiosomal and humeral plates........................................... 2 - Callosities absent..................................................................................... 4 2. Setae 4 a present, 2 pairs of callosities present.............................................................. 3 - Setae 4 a absent, 1 pair of callosities present....................................................... E. parvisetus 3. Distance between bases of setae d 1 – d 1 only slightly longer than distance c 1 – c 1, dorsal idiosomal plates almost smooth.............................................................................................. … E. rhodomela - Distance between bases of setae d 1 – d 1 more than 2 times longer than distance c 1 – c 1, dorsal idiosomal plates with large lateral and small medial dimples............................................................ E. tjumeniensis sp. nov . 4. Eyes present........................................................................................ 5 - Eyes absent................................................................................ E. coronaria 5. Dorsal setae brush-shaped............................................................................. 6 - Dorsal setae of another shape........................................................................... 7 6. Femur IV with 4 setae...................................................................... E. anauniensis - Femur IV with 5 setae......................................................................... E. plumifer 7. Dorsal setae clavate................................................................................... 8 - Dorsal setae saber-like or baculiform..................................................................... 9 8. Setae 4 a present, 3 pairs of aggenital setae.......................................................... E. clavata - Setae 4 a absent, 2 pairs of aggenital setae....................................................... E. jiangxiensis 9. 1 or 3 pairs of aggenital setae present, dorsal setae saber-like................................................. 10 - 2 pairs of aggenital setae present, dorsal setae baculiform............................................. E. collarti 10. 3 pairs of aggenital setae present........................................................................ 11 - 1 pair of aggenital setae present................................................................... E. segnis 11. 3 pairs of pseudanal setae present............................................................. E . ioanninensis - 4 pairs of pseudanal setae present................................................................. E. pinnata