Pachymeridiidae

Lu, Ying, Yao, Yunzhi & Ren, Dong, 2011, Two new genera and species of fossil true bugs (Hemiptera: Heteroptera: Pachymeridiidae) from northeastern China, Zootaxa 2835, pp. 41-52 : 42

Key to genera of Pachymeridiidae of China

1. Sc, R and M diverging at single point; postocular in moderate length............................................. 2

- Sc, R and M diverging at closed two separate points; postocular extremely short........... Corollpachymeridium gen. nov.

2. R, with C+Sc connected at apex of corium............................................ Viriosinervis Yao et al., 2008

- R ending at corium-membrane boundary, and not connected with C+Sc........................................... 3

3. Veins of membrane with bifurcating emanating veins or wide veins.............................................. 4

- Membrane with several free simple longitudinal veins........................................................ 5

4. Third tarsomere longest; veins of membrane with five bifurcating emanating veins; membrane with clear marking....................................................................................... Beipiaocoris Yao et al., 2008

- First tarsomere longest; membrane with four free wide veins; membrane without marking........ Bellicoris Yao et al., 2008

5. Rostrum extending to the middle of mid coxae and hind coxae; membrane with six free wide veins..................... 6

- Rostrum long, reaching to second sternite of abdomen, obviously beyond hind coxae; membrane with seven free wide veins.......................................................................... Sinopachymeridium Yao et al., 2006

6. With collar; hemelytron extending beyond tip of abdomen; membrane with clear marking. Peregrinpachymeridium gen. nov.

- Without collar; hemelytron not reaching to tip of abdomen; membrane without marking........... Niticoris Yao et al., 2008