Euseius, Wainstein, 1962

Key to the females of Euseius View in CoL View at ENA described or reported from India (modified from Kar & Karmakar, 2021b)

1. Ventrianal shield pentagonal, dentitions of cheliceral fixed digit clustered apically distal to pilus dentilis with one basal tooth.................................................................. Euseius mangiferae ( Ghai & Menon, 1967) View in CoL

- Ventrianal shield not pentagonal, dentitions of cheliceral fixed digit clustered apically distal to pilus dentilis without any basal tooth............................................................................................... 2

2. Setae s4, S4 and S5 barbed.................................................. E. sativum Karmakar & Gupta, 2014

- Setae s4, S4 and S5 not barbed........................................................................... 3

3. Seta J2 longer than setae j1, j3, Z4 ............................................. E. eucalypti ( Ghai & Menon, 1967) View in CoL

- Seta J2 always shorter than any of the setae j1, j3, Z4 ......................................................... 4

4. Seta JV1 on anterior margin of ventrianal shield............................................................. 5

- Seta JV1 migrated posteriorly away from anterior margin of ventrianal shield...................................... 9

5. Dorsum smooth, calyx of spermatheca bell-shaped................................ E. chikmagalurensis ( Gupta, 1986) View in CoL

- Dorsum reticulated, calyx of spermatheca not bell-shaped..................................................... 6

6. Dorsum striated forming longitudinal cells, cheliceral movable digit bidentate.......... E. hima ( Pritchard & Baker, 1962) View in CoL

- Dorsum reticulated forming net-like transverse cells, cheliceral movable digit unidentate............................ 7

7. Peritreme extending beyond bases of seta j3 ......................................... E. chitradurgae ( Gupta, 1986) View in CoL

- Peritreme not extending beyond bases of z2 ................................................................ 8

8. Leg IV with three macrosetae.................................................... E. karpasae Kumar et al., 2022

- Leg IV with only one macroseta on basitarsus...................................... E. kalimpongensis ( Gupta, 1969) View in CoL

9. All dorsal setae much shorter than j1 and Z5 ............................................................... 10

- All dorsal setae of various lengths with respect to j1 and Z5 ................................................... 13

10. All macrosetae of leg IV spatulated............................................. E. macrospatulatus ( Gupta, 1986) View in CoL

- All the macrosetae of leg IV not spatulated................................................................ 11

11. Dorsum smooth, posterior margin of sternal shield concave......................... E. sacchari ( Ghai & Menon, 1967) View in CoL

- Dorsum anterolaterally striated, posterior margin of sternal shield never concave.................................. 12

12. Posterior margin of sternal shield inconspicuous................................. E. vikrami Karmakar & Gupta, 2014

- Sternal shield conspicuous with posterior projections....................................... E. ovalis ( Evans, 1953) View in CoL

13. Major duct of spermatheca banded with light sclerotisation................................... E. aridophilus sp. nov.

- Major duct of spermatheca never banded with sclerotisation.................................................. 14

14. Calyx of spermatheca tubular........................................................................... 15

- Calyx of spermatheca not tubular........................................................................ 29

15. Calyx of spermatheca banded.................................... E. bandispermathecae Pramanik & Karmakar, 2016

- Calyx of spermatheca not banded........................................................................ 16

16. Atrium of spermatheca falcate................................................. E. curcasae Santhosh et al., 2018

- Atrium of spermatheca never falcate..................................................................... 17

17. Sternal shield reticulated, calyx of spermatheca sclerotised proximally................ E. tripurii Kar & Karmakar, 2022a

- Sternal shield smooth, calyx of spermatheca not sclerotised proximally.......................................... 18

18. Seta j3 twice the length of j1, dentitions of fixed digit of chelicerae distributed evenly along its length.................................................................................................... E. hibisci ( Chant, 1959) View in CoL

- Seta j3 shorter or subequal to j1, dentitions of fixed digit of chelicerae clustered apically............................ 19

19. Peritreme not extending beyond the bases of seta z2 ......................................................... 20

- Peritreme extending beyond bases of seta z2 ............................................................... 23

20. Dorsal seta s4 minute 6–9................................................... E. pariyarensis Santhosh et al., 2018

- Dorsal seta s4 longer than 20........................................................................... 21

21. Leg IV macrosetae knobbed, dorsum smooth, seta z4 crossing bases of s4 ............... E. scutalis ( Athias-Henriot, 1958) View in CoL

- Leg IV macrosetae pointed, dorsum never smooth, seta z4 not touching bases of s4 ................................ 22

22. Dorsal shield antero-laterally striated, macroseta on genu shorter 30–33.......................... E. tamilicus sp. nov.

- Dorsal shield antero-laterally striated, macroseta on genu longer 52–57........... E. delhiensis ( Narayanan & Kaur, 1959) View in CoL

23. Sternal shield 1.5 times longer than wide......................................... E. papayensis ( Sadanandan, 2006)

- Sternal shield as long as wide........................................................................... 24

24. Atrium of spermatheca horse-shoe shaped.................................... E. tubuliferus Kar & Karmakar, 2022b

- Atrium of spermatheca not horse-shoe shaped.............................................................. 25

25. Seta j1 more than twice the length of Z5 ......................................... E. rhododendronis ( Gupta, 1970) View in CoL

- Seta j1 not more than 1.5 times the length of Z5 ............................................................ 26

26. Dorsal shield reticulated with longitudinal cells............................................................ 27

- Dorsal shield anterolaterally striated..................................................................... 28

27. Cheliceral movable digit toothless, seta S5 longer 28–34.................................. E. alstoniae ( Gupta, 1975) View in CoL

- Cheliceral movable digit unidentate, seta S5 shorter 14–17.......................... E. neoalstoniae Kumar et al., 2022

28. Longer dorsal seta s4 43, leg IV macrosetae knobbed.................................... E. concordis ( Chant, 1959) View in CoL

- Shorter dorsal seta s4 18 –23, leg IV macrosetae blunt......................... E. bomdilae Pramanik & Karmakar, 2016

29. Calyx of spermatheca medially constricted................................................................ 30

- Calyx of spermatheca not constricted medially............................................................. 40

30. Calyx of spermatheca annulated.............................................. E. insanus ( Khan & Chaudhri, 1969) View in CoL

- Calyx of spermatheca not annulated...................................................................... 31

31. Seta Z5 twice the length of j1, calyx of spermatheca constricted throughout its length................................................................................................... E. astrictus Karmakar & Bhowmik, 2018

- Seta Z5 less than twice that of j1, calyx of spermatheca not constricted throughout the length........................ 32

32. Sternal shield smooth................................................................................. 33

- Sternal shield reticulated............................................ E. madhubanensis Karmakar & Biswas, 2023

33. Calyx of spermatheca oyster (freshwater shell) shaped.......................... E. jhinukae Karmakar & Biswas, 2023

- Calyx of spermatheca not oyster shaped.................................................................. 34

34. Seta j1 twice that of j3, cheliceral movable digit bidentate...................... E. tripuraensis Kar & Karmakar, 2022a

- Seta j1 not twice than j3, cheliceral movable digit not bidentate................................................ 35

35. Dorsum smooth, ventrianal shield pentagonal................................... E. bambusae ( Ghai & Menon, 1967) View in CoL

- Dorsum reticulated, ventrianal shield not pentagonal........................................................ 36

36. Both setae r3 and R1 located off dorsal shield.............................................................. 37

- At least one of setae r3 and R1 located on dorsal shield...................................................... 38

37. Leg IV macrosetae sharp, cheliceral movable digit unidentate...................... E. prasadi Chant & McMurtry, 2005 View in CoL

- Leg IV macrosetae blunt, cheliceral movable digit toothless............................... E. coccineae ( Gupta, 1975) View in CoL

38. Any one of setae r3 and R1 located on-shield.............................................................. 39

- Both the setae r3 and R1 located on-shield............................................ E. ahaioensis ( Gupta, 1992) View in CoL

39. Only seta r3 located on dorsal shield............................................. E. finlandicus ( Oudemans, 1915) View in CoL

- Only seta R1 located on dorsal shield....................................... E. spontaneum Kar & Karmakar, 2022a

40. Calyx of spermatheca flared at atrium.................................................................... 41

- Calyx of spermatheca never flared at atrium............................................................... 45

41. Seta j1 twice the length of j3........................................................................... 42

- Setae j1 and j3 subequal............................................................................... 43

42. Seta R1 on dorsal shield, leg IV macrosetae capitate............................ E. dwakiensis Kar & Karmakar, 2021b

- Seta R1 off dorsal shield, leg IV macrosetae not capitate............................. E. neococcineae ( Gupta, 1978c)

43. Calyx of spermatheca annulated................................................ E. fascae Kar & Karmakar, 2021b

- Calyx of spermatheca not annulated...................................................................... 44

44. Leg IV macrosetae capitate............................................... E. coccosocius ( Ghai & Menon, 1967) View in CoL

- Leg IV macrosetae hyaline-tipped........................................ E. sajnekhalicus Kar & Karmakar, 2021a

45. Calyx of spermatheca fundibular.................................... E. arunachalensis Pramanik & Karmakar, 2016

- Calyx of spermatheca not fundibular..................................................................... 46

46. Sternal shield smooth................................................................................. 47

- Sternal shield rugose.................................................................................. 49

47. Movable digit of chelicerae toothless.......................................... E. chittooriensis Kumar et al., 2022

- Movable digit of chelicerae unidentate................................................................... 48

48. Setae j1 36, r3 26, R1 20, SgeIV 23............................................... E. vignus Rishi & Rather, 1983 View in CoL

- Setae j1 28–30, r3 12–14, R1 11–14, SgeIV 37........................ E. sundarbanensis Karmakar & Bhowmik, 2018

49. Sternal shield reticulated, peritreme extended beyond seta j3, leg IV macrosetae pointed.................................................................................................... E. coimbatorensis Suresh et al., 2014

- Sternal shield striated, peritreme not extended beyond seta j3, leg IV macrosetae blunt............... E. madrasi sp. nov.