Sinella, Wu & Huang & Luan, 2018

Wu, Jun, Huang, Cheng-Wang & Luan, Yun-Xia, 2018, A new species and a new record of Sinella Brook (Collembola: Entomobryidae) from Guizhou Province, China, Zootaxa 4444 (4), pp. 484-490 : 488-489

Key to the eyeless species of Sinella from China

1 Antenna more than five times as long as cephalic diagonal..................... longiantenna Zhang & Deharveng, 2011

- Antenna less than five times as long as cephalic diagonal...................................................... 2

2 Mucronal basal spine long, reaching anywhere between from midway to between the subapical tooth and the apical tooth to beyond the apex of the mucro............................................................................ 3

- Mucronal basal spine short, reaching at about the apex of the subapical tooth..................................... 15

3 Abd. IV with 3+3 central mac......................................................... triseta Yuan & Pan, 2013

- Abd. IV with at leat 5+5 central mac...................................................................... 4

4 Abd. IV with 5+5 central mac............................................................................ 5

- Abd. IV with 6+6 or 7+7 central mac...................................................................... 8

5 Abd. II with 5+5 central mac...................................................... quinseta Xu & Zhang, 2016

- Abd. II with 3+3 or 4+4 central mac....................................................................... 6

6 Abd. II with 3+3 central mac............................................................................ 7

- Abd. II with 4+4 central mac.................................................. lipase Zhang & Deharveng, 2011

7 Unguiculus outer tooth large................................................ yunnanica Zhang & Deharveng, 2011

- Unguiculus outer tooth minute................................................. trogla Chen & Christiansen, 1993

8 Abd. II with 3+3 central mac........................................................................... 10

- Abd. II with 4+4 central mac............................................................................ 9

9 Manubrial smooth chaetae absent............................................. insolens Chen & Christiansen, 1993

- Manubrial smooth chaetae absent.................................................. qixiaensis Xu & Zhang, 2016

10 Abd. IV with 7+7 central mac........................................................................... 11

- Abd. IV with 6+6 central mac........................................................................... 12

11 Abd. IV with 6+6 lateral mac............................................... sineocula Chen & Christiansen, 1993

- Abd. IV with 4(5)+4(5) lateral mac................................................... colubra Xu & Chen, 2016

12 Unguiculus outer tooth large............................................................................ 13

- Unguiculus outer teeth minute.......................................................................... 14

13 Abd. I with 6+6 mac........................................................ hexaseta Qu, Zhang & Chen, 2010

- Abd. I with 8(7)+8(7) mac.......................................................... liuae Zhao & Zhang, 2016

14 Antenna / cephalic diagonal = 2.5–2.9, Abd. I with 8 mac.................................. tigris Zhao & Zhang, 2016

- Antenna / cephalic diagonal = 1.7–2.4, Abd. I with 9–11 mac............................. minuta Zhao & Zhang, 2016

15 Abd. I with 3+3 mac.................................................... longiungula Zhang & Deharveng, 2011

- Abd. I with at least 5+5 mac............................................................................ 16

16 Abd. I with 5+5 mac................................................................ zhangi Xu & Chen, 2016

- Abd. I with 6+6 or 7+7 mac............................................................................ 17

17 Abd. II with 2+2 central mac........................................................ tiani Zhao & Zhang, 2016 - Abd. II with at least 3+3 central mac..................................................................... 18

18 Abd. II with 4+4 central mac..................................................... bui Xu, Zhao & Huang, 2016

- Abd. II with 3+3 central mac........................................................................... 19

19 Abd. IV with 7+7 central mac.................................................... hunanica Zhao & Zhang, 2016

- Abd. IV with 5+5 central mac........................................................................... 20

20 Unpaired ungual tooth absent................................................ whitteni Zhang & Deharveng, 2009

- Unpaired ungual tooth present................................................... christianseni Ma & Chen, 1997