Key to Nazeris species from Guangxi and its adjacent areas.
1. Head with punctation as illustrated (Hu et al. 2005: 96, fig. 1)..................... N. guizhouensis Hu, Li & Zhao, 2005
- Head with umbilicate punctation......................................................................... 2
2. Abdomen with fine microsculpture on all tergites.................................................. N. qini sp. n.
- Abdomen lacking microsculpture........................................................................ 3
3. Median carina of prosternum extending to anterior margin of prosternum......................................... 4
- Median carina of prosternum disappearing behind anterior margin of prosternum.................................. 10
4. Body reddish brown, at most 5.4 mm ...................................................................... 5
- Body dark brown, at least 5.8 mm ....................................................................... 8
5. Dorso-lateral apophysis of aedeagus extending to level of apex of median lobe (Fig. 4)............... N. dayaoensis sp. n.
- Dorso-lateral apophysis of aedeagus extending distinctly beyond apex of median lobe.............................. 6
6. Median lobe of aedeagus with narrowly round apex (Watanabe & Xiao 1993: 132, fig. 3).. N. zhangi Watanabe & Xiao, 1993
- Median lobe of aedeagus with widely truncate apex.......................................................... 7
7. Median lobe of aedeagus with round laminae on dorsal side and apical tubercles on ventral side (Figs. 10, 12).. N. luoi sp. n.
- Median lobe of aedeagus with crescent laminae on dorsal side, lacking apical tubercles on ventral side (Figs. 16, 18)................................................................................................. N. tani sp. n.
8. Dorso-lateral apophyses of aedeagus extending to apical fourth of median lobe (Fig. 34)................ N. grandis sp. n.
- Dorso-lateral apophyses of aedeagus extending beyond apex of median lobe....................................... 9
9. Male sternite VII with posterior margin semi-circularly emarginated at middle (Fig. 26); sternite VIII with posterior margin V- shaped concaved at middle (Fig. 27)........................................................ N. megalobus sp. n.
- Male sternite VII with posterior margin shallowly and broadly emarginated at middle (Watanabe & Xiao 2000: 314, fig. 2); sternite VIII with posterior margin U-shaped concaved at middle (Watanabe & Xiao 2000: 314, fig. 2)....................................................................................... N. baihuaensis Watanabe & Xiao, 2000
10. Male sternite VIII with short protrusion in middle, median lobe of aedeagus bi-lobed in dorsal view (Hu et al. 2011: 18, fig. 9).............................................................................. N. caoi Hu, Li & Zhao, 2011
- Male sternite VIII without protrusion in middle, median lobe of aedeagus not bi-lobed in dorsal view.................. 11
11 Median lobe of aedeagus tri-lobed in dorsal view (Hu et al. 2011: 17, fig. 5).......... N. nabanhensis Hu, Li & Zhao, 2011
- Median lobe of aedeagus not tri-lobed in dorsal view........................................................ 12
12. Dorso-lateral apophyses of aedeagus extending beyond apex of median lobe...................................... 13
- Dorso-lateral apophyses of aedeagus not extending to apex of median lobe....................................... 16
13. Dorso-lateral apophyses of aedeagus dilated in apical part and distinctly curved ventrad in apical half (Watanabe & Xiao 2000: 317, figs. 9, 10)........................................................... N. nomurai Watanabe & Xiao, 2000
- Dorso-lateral apophyses of aedeagus not dilated in apical part and not distinctly curved ventrad in apical half............ 14
14. Median lobe of aedeagus subtriangular in apical third in dorsal view and curved dorsad near apex in lateral view (Watanabe & Xiao 2000: 319, figs. 16, 17)........................................... N. huanxipoensis Watanabe & Xiao, 2000
- Median lobe of aedeagus not subtriangular in apical third in dorsal view, not curved dorsad near apex in lateral view..... 15
15. Postocular part less than twice as long as eye length; depth of excision of posterior margin of male sternite VIII more than twice its width (Watanabe & Xiao 1997: 4, fig. 5)............................ N. jizushanensis Watanabe & Xiao, 1997
- Postocular part more than twice as long as eye length; depth of excision of posterior margin of male sternite VIII nearly the same its width (Watanabe & Xiao 1997: 4, fig. 4)................................ N. daliensis Watanabe & Xiao, 1997
16. Median lobe of aedeagus semi-circularly emarginate at apex (Watanabe & Xiao 2000: 320, figs. 19)........................................................................................... N. ishiianus Watanabe & Xiao, 2000
- Median lobe of aedeagus not emarginate at apex............................................................ 17
17. Median lobe of aedeagus tongue-shaped; dorso-lateral apophyses of aedeagus very narrow and near straight in dorsal view (Watanabe & Xiao 1997: 7, fig. 9)............................................ N. alpinus Watanabe & Xiao, 1997
- Median lobe of aedeagus not tongue-shaped, distinctly narrowed in apical fourth in dorsal view; dorso-lateral apophyses of aedeagus distinctly curved inward in dorsal view (Watanabe & Xiao 1997: 5, fig. 6)... N. giganteus Watanabe & Xiao, 1997