Key to males of Micadina Redtenbacher, 1908 from China

1. Anal abdominal segment shorter than or as long as eighth abdominal tergum...................................... 2.

- Anal abdominal segment longer than eighth abdominal tergum................................................ 6.

2. Anal abdominal segment shorter than eighth abdominal tergum................................................ 3.

- Anal abdominal segment about as long as eighth abdominal tergum............................................. 5.

3. Cerci strongly curved inwards, posterior margin of anal abdominal segment emarginated...................... M. sonani

- Cerci slightly curved, posterior margin of anal abdominal segment truncate...................................... 4.

4. Lateral margin of ninth tergum distinctly arched................................................... M. fujianensis

- Lateral margin of ninth tergum slightly arched.................................................... M. yingdeensis

5. Cerci curved inwards...................................................................... M. zhejiangensis

- Cerci straight........................................................................... M. phluctaenoides

6. Cerci short, not surpassing posterior margin of anal abdominal segment......................................... 7.

- Cerci long, surpassing posterior margin of anal abdominal segment............................................. 8.

7. Apices of cerci broadly bifurcated................................................................... M. reni

- Apices of cerci not bifurcated.................................................................... M. bilobata

8. Posterior half of anal abdominal segment completely curved beneath............................................ 9.

- Posterior half of anal abdominal segment nearly curved beneath............................................... 10.

9. Posterolateral angles of ninth abdominal tergum elongated posteriorly......................... M. songxiaobini sp. nov.

- Posterolateral angles of ninth abdominal tergum rounded.............................................. M. involuta

10. Cerci spoon-shaped............................................................................. M. cheni

- Cerci straight and cylindrical.................................................................... M. difficilis