Key to cave Sinella species 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. Eyes 1+1.............................................................. fuyanensis Chen & Christiansen, 1993

- Eyes absent......................................................................................... 3

3. 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.......................................................................... 4

- Mucronal basal spine short, reaching at about the apex of the subapical tooth.................................... 11

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

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

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

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

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

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

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

- Abd. II with 4+4 central mac................................................ insolens Chen & Christiansen, 1993

8. Abd. IV with 6+6 central mac............................................................................ 9

- Abd. IV with 7+7 central mac.............................................. sineocula Chen & Christiansen, 1993

9. Unguiculus outer tooth large................................................................... liuae sp. nov.

- Unguiculus outer tooth minute.......................................................................... 10

10. Antenna / cephalic diagonal = 2.5–2.9, Abd. I with 8 mac............................................ tigris sp. nov.

- Antenna / cephalic diagonal = 1.7–2.4, Abd. I with 9–11 mac....................................... minuta sp. nov.

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

- Abd. I with 7+7 or 8+8 mac............................................................................ 12

12. Abd. II with 2+2 central mac.................................................................. tiani sp. nov.

- Abd. II with 3+3 central mac.......................................................................... 13

13. Abd. IV with 5+5 central mac................................................ whitteni Zhang & Deharveng, 2009

- Abd. IV with 7+7 central mac.............................................................. hunanica sp. nov.