Tetranychinae

Marić, Ivana, Marčić, Dejan, Petanović, Radmila & Auger, Philippe, 2018, Biodiversity of spider mites (Acari: Tetranychidae) in Serbia: a review, new records and key to all known species, Acarologia 58 (1), pp. 3-14 : 11-13

Tetranychinae

11. Empodium claw-like, small; duplex setae not closely associated, dorsohysterosomal setae nearly as long as intervals between them.......................................... E. buxi — Empodium claw-like or spit distally, 2 pairs of duplexes present on tarsus I, f 1 setae in normal position..................................................................... 12

12. 2 pairs of ventrocaudal (para-anal) setae........................................... 13

— 1 pair of ventrocaudal setae....................................................... 31

13. Empodium claw-like............................................................ 14

— Empodium split into up to 3 pairs of hairs.......................................... 18

14. Empodium a single claw-like structure, with proximoventral hairs....................15 — Empodium split into 2 claw-like structures..........................................16

15. f 2 and h 1 setae similar in length............................................... P. citri

— f 2 setae about 1.5 longer than h 1 setae.......................................... P. ulmi

16. Dorsocentral hysterosomal setae far longer than intervals between two consecutive rows, reaching past second seta caudad......................................... S... parasemus

— Dorsocentral hysterosomal setae about as long or slightly longer than intervals between two consecutive setae................................................................... 17

17. Male aedeagus without knob, needle like, sinuous, tapering distally......... S... garmani

— Male aedeagus up turned, knob with both projection acute, posterior one well developed, elongate, tapering, forming an angle about 45° with the shaft axis............. S... schizopus

18. Empodium split distally, dorsal body setae set on strong tubercles.................... 19 — Empodium split near the middle................................................... 20

19. Palptibial claw longer than palptarsus, stylophore rounded anteriorly............ N.. rubi

— Palptibial claw shorter than palptarsus, stylophore notched anteriorly......... N.. rubicola

20. Male aedeagus obviously downcurved posteriorly.................................. 21

— Male aedeagus long, tapering, straight or sinuous....................................24

21. Aedeageal knob present, anterior and posterior projections acute, male spinneret tiny.....

.......................................................................... E. rubiphilus

— Aedeagus sigmoid, without knob.................................................. 22

22. Aedeagus tip upturned, not tapering........................................ E.. fraxini

— Aedeagus tip not upturned and acute............................................... 23

23. Peritreme straight distally, male spinneret tiny.............................. E. deflexus

— Peritreme hooked distally, male spinneret well developed..................... E... clitus

24. Distal end of peritreme branched or anastomosing........................... E.. populi

— Peritremal end straight or bent..................................................... 25

25. Peritreme straight, bulbous distally........................................ E.. carpini

— Peritreme bent distally or U-shaped................................................ 26

26. Aedeagus long, slender, nearly straight.................................. E... tiliarium

— Aedeagus sinuous................................................................ 27

27. Aedeagus slightly sinuous, stout, tapering gradually to tube-like tip, down directed distally E. weldoni

— Aedeagus long, slender, obvious undulation present................................. 28

28. Distal part of peritreme strongly hooked with several compartments, female spinneret about

2.5 as long as wide........................................................... E. uncatus

— Distal part of peritreme bent posteriorly............................................ 29

29. Aedeagus with last straight portion equal to 0.3 time the total length............ E.. pruni

— Aedeagus with last straight portion more than 0.4 time the total length.................30

30. Female palptarsal terminal sensillum less than 3 times as long as broad.......... E. aceri

— Female palptarsal terminal sensillum 3 times or more as long as broad........... E. coryli

31. Empodium claw like with proximoventral hairs, dorsal setae longer than intervals, 7 and

5 tactile setae present on tarsi I and II, respectively, live females dark red to reddish-brown in color; male aedeagus bent ventrad at a right angle tapering gradually to a slender tip......... .......................................................................... O. ununguis *

— Empodium split distally...........................................................32

32. Peritreme bent distally, hook-like................................................. 33

— Peritremal distal enlargement anastomosed............................... A.. viennensis

33. Female tarsus I with proximal pair of duplex setae in line with all 4 proximal tactile setae;

knob of male aedeagus with both projections acute, anterior projection small, posterior one well developed, dorsocaudally directed, acute, deflexed distally................ T.... evansi .

— Female tarsus I with proximal pair of duplex setae distad the four proximal tactile setae...

....................................................................................34

34. Dorsal margin of the knob angulate, knob large.......................... T... turkestani

— Dorsal margin of the knob rounded, knob small............................. T... urticae

* Oligonychus brevipodus was not included in the key because there is no reliable data available to separate this species from other members belonging to the genus Oligonychus . As proposed

by Pritchard & Baker (1955) topotype material should be collected to redescribe this species.