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.

Published as part of Zhao, Lina & Zhang, Feng, 2016, New cave species of Sinella Brook, 1882 from China (Collembola: Entomobryidae), pp. 523-541 in Zootaxa 4161 (4) on page 540, DOI: 10.11646/zootaxa.4161.4.3, http://zenodo.org/record/262098