Trioserica species

Ahrens, Dirk, Liu, Wangang, Fabrizi, Silvia & Bai, Ming, 2021, Taxonomic review on the Trioserica Moser, 1922 species of China (Coleoptera Scarabaeidae: Melolonthinae: Sericini), Zootaxa 4999 (4), pp. 343-355 : 344

Key to Trioserica species occurring in China (♂♂)

1 Posterior margin of metafemur weakly convex to straight...................................................... 2

- Posterior margin of metafemur bluntly widened forming a blunt tooth.... T. shiyiduiensis Ahrens, Liu & Fabrizi , new species

2 Right paramere longer, at least half as long as left paramere.............. T. lilongensis Ahrens, Liu & Fabrizi , new species

- Right paramere short, less than half as long as left paramere................................................... 3

3 Right paramere straight....................................... T. cangyuanensis Ahrens, Liu & Fabrizi , new species

- Right paramere strongly curved.......................................................................... 4

4 Right paramere simple. Left paramere inserted more dorsally......... T. dinghushanica Ahrens, Liu & Fabrizi , new species

- Right paramere bilobate. Left paramere inserted laterally...................................................... 5

5 Left paramere basally straight and in apical half moderately curved (lateral view). Right paramere strongly widened.......................................................................... T. maculipennis ( Miyake & Yamaya, 2001)

- Left paramere basally more strongly curved and in apical half nearly straight rather than curved (lateral view). Right paramere more narrow................................................... T. daweishana Ahrens, Liu & Fabrizi , new species