Xinjiangsha

Kalúz, Stanislav & Kováčik, Ján, 2012, Two new chiggers of the genus Xinjiangsha (Acari: Trombiculidae) and a key to species of the genus, Zootaxa 3595, pp. 77-88 : 85-86

Key to species of the genus Xinjiangsha (larvae)

1. Genu I with 2 genualae................................................................................ 2

- Genu I with 3 genualae................................................................................ 4

2. fPp=B.B.BBB....................................................................................... 3

- fPp=B.B.NNB; two pairs of humeral setae (4H); DS = 53–70; VS = 35–46; NDV = 94–105; PL>AM=AL; SB<ASB>PSB; SD<AW<PW; fD = 4H+14(15)-9(13)-11(9)-4(6)-10(4)-6(2)-6(0)-4(0)-2(0) = 70(53); Ip = 923–1013................................................................................................ X. obuchi (Kováčik and Kalúz)

3. Without scuto-ocular setae, with one pair of PPL; Ga = B; fD = 2H+10(8-11)-8(9)-8(6-7)-8-4(6)-4-2 = 54(44–54); VS = 46–56..................................................................... X. tshatkalica (Hushcha and Kharadov)

- With one pair of scuto-ocular setae and one pair of PPL; Ga = N; fD = 4H+16-6-13-4- 10 -5-9-7-4 = 78; VS = 40; NDV = 118................................................................................... X. stekolnikovi sp. nov.

4. fCx = 1-2-1.......................................................................................... 5

- fCx otherwise........................................................................................ 6

5. fSt = 2-2; Ga = N; fD = 4H+82(80) = 84–86; VS = 50–68; NDV = 136–152; Ip = 870–918; AM>PL>AL=PPL........................................................................................... X. montana (Kudryashova)

- fSt = 2–4; Ga = B; PL>AM>AL; fD = 4H+8(12)-6(8)-10(13)-6(7)-8(12)-10(10)-6(6)-2(2)-2(2) = 62–76; VS = 40–63; Ip = 923–1013.................................................................. X. ludmilae (Kováčik and Kalúz)

6. fCx = 1-1-2.......................................................................................... 7

- fCx = 1-1-1.......................................................................................... 9

7. Two pairs of humeral setae (4H), without scuto-ocular setae (OS) PPL on scutum; fD = 4H+ 14-2-10 (12-13)-2- 10 -4-12-8-4 = 70(67); fV = 14-10-10- 10-8-6-6 = 64; PL=PPL>AM≥AL........................ X. tokobajevi (Hushcha and Kharadov)

- One pair of humeral setae (2H), with scuto-ocular setae (OS)................................................... 8

8. Scutum pentagonal, with straight margins; DS = 2H+60 = 62; VS = 69; NDV = 131...... X. armata (Schluger and Bibikova)

- Scutum subpentagonal, with rounded margins; DS = 2H+50 = 52; VS = 44+20 = 64; NDV = 116................................................................................................ X. scutocularis Wen, Shao and Ma

9. Scuto-ocular setae absent, one pair of PPL................................................................. 10

- Scuto-ocular setae present, one or more pairs of PPL......................................................... 20

10. Two pairs of humeral setae (4H)......................................................................... 11

- One pair of humeral setae (2H).......................................................................... 16

11. Galeala branched (Ga = B), fPp = B.B.NBB; fSt = 2-2; DS = 4H+50 = 54; VS = 34; NDV = 88; Ip = 878-907; PL>AL>AM>PPL..................................................................... X. iberica (Schluger)

- Galeala nude (Ga = N)................................................................................ 12

12. DS> 70; NDV> 120; AM>PL=AL; Ga = N; fPp = B.B.NNB; fSt = 2-2; DS = 4H+74=78; VS = 44; NDV = 122; AM>PL=AL; Ip = 752.................................................................. X. tarda (Schluger)

- DS <60; NDV <110.................................................................................. 13

13. PL <AM; PL <AL; Ga = N; fPp = B.B.BNB; fSt = 2-2; fD = 4H+10- 10-8-8-4 -2 = 42(44); fV = 12- 12-4-6-6-4 -2=44 (46); NDV = 74-80 (90); AL=AM>PL≥PPL; dorsal setae and also sensilla thickened, length of sensillum = 2xPL; Ip = 600-634..................................................................................... X. imlilica (Brown)

- PL> AM; PL> AL.................................................................................. 14

14. fPp = B.B.NNB; Ip <750; PL>AM>AL=PPL; fD = 4H + (9-2-5)- 12-2-8-8-4 = 50; fV = 3-6-5-2-8-4-4-2 = 34; NDV = 84.................................................................................. X. monticola (Kolebinova)

- fPp = B.B.NBB; Ip> 800.............................................................................. 15

15. PL>PPL>AM≥AL; scutal posterior margin slightly triangular, AM reaching scutal posterior margin; SB situated slightly cau- dally from the level of PL bases......................................................... X. theodori (Hushcha)

- PL=PPL>AM=AL; scutal posterior margin semi-rounded, AM shorter and not reaching scutal posterior margin; SB situated at the level of PL bases........................................................ X. blanci (Vercammen-Grandjean)

16. fPp = B.B.BBB; Ip> 900; fD = 2H+8-6-8-6-2-4 = 36; fV = 6-2-6-2 and 4-4-2 = 24; NDV = 60; Ip = 936; PL>AM>PPL>AL......................................................................... X. raissae (Hushcha and Kharadov)

- fPp other........................................................................................... 17

17. Six setae in each of two-three anterior dorsal rows; fPp = B.B.NNB; PPL> AM; Ga = B; PL>PPL>AM>AL; fD = 2H+6-6-2- 6-6-4-2 = 34; fV = (10-5)-(7-2)-6-4-2-2 = 38; NDV = 72; Ip = 771-913......................... X. danieli (Kolebinova)

- More than six setae in each of two-three anterior dorsal rows; AM> PPL........................................ 18

18. Scutum subpentagonal, caudally triangular; fPp = B.B.BNB; Ga = N; Ip <800.................... X. galla (Kolebinova)

- Scutum caudally semirounded; fPp= B.B.NBB............................................................. 19

19. Ga = B; fPp = B.B.NBB; Ip <850, fD = 2H+8-8-8-2-4-2 = 34; fV = 2-4-6-5-4-4 = 25; NDV = 59 (58–68); PL>AM>PPL>AL; Ip = 650–825....................................................................... X. talpae (Kolebinova)

- Ga = N; fPp = B.B.NBB; Ip> 850; fD = 2H+ 10-4-9-9-2 -2-4 = 42; VS = 35; PL>AM≥PPL>AL; Ip = 867................................................................................ X. variabilis (Schluger and Vshivkov) , partially

20. Ga = B; fPp = B.B.BBN; 2 PPL, 2 OS; fD = 2H+8- 10 -9-6-4-2 = 41; fV = 2-2- 14 -6-6-6-2 = 38; NDV = 79; PL>PPL>AM>AL............................................................................ X.. feideri (Daniel and Brelih)

- Ga = N, fPp otherwise................................................................................. 21

21. NDV ≤ 80, fPp = B.B.NBB; Ga = N; 3–6 PPL; fD = 2H+ 10-4-9-9-2 -2-4 = 42; VS = 35; NDV = 77; PL>AM ≥PPL>AL.................................................................... X. variabilis (Schluger and Vshivkov) , partially

- NDV> 110, fPp = B.B.NNB; 4–7H...................................................................... 22

22. fD = 4H+12-5- 15 -6-12-6-4 = 64; NDV = 113; tip of AM seta distinctly oversteps posterior scutal margin; AM>PL=PPL>AL...................................................................................... X. rychliki sp. nov.

- fD = 7H+(17-11)-24- 21-8-8-7 = 103; NDV = 163; 4 PPL, 2 OS; tip of AM seta reaches posterior scutal margin................................................................................... X. lyciaensis Stekolnikov and Daniel