A–D Tetraserica masumotoi Kobayashi, 2017 (Thailand, Mae Hong Son) E–H T. wiangpapaoana Kobayashi, 2017 (Thailand, Doi Inthanon) I–L T. spinotibialis sp. n. (holotype) A, E, I aedeagus, left side lateral view C, G, K aedeagus, right side lateral view B, F, J parameres, dorsal view D, H, L habitus. Scale bars: 0.5 mm. Habitus not to scale.

 
 
  Part of: Fabrizi S, Dalstein V, Ahrens D (2019) A monograph on the genus Tetraserica from the Indochinese region (Coleoptera, Scarabaeidae, Sericini). ZooKeys 837: 1-155. https://doi.org/10.3897/zookeys.837.32057