Ventral view of thorax of eastern Palaearctic and Oriental genera of the Megasternini. A. Morastus gracilipalpis. B. Oosternum sp. (O. soricoides group). C. Emmidolium excavatum. D. Chimaerocyon shimadai. E. Paroosternum sp. F. Oreosternum frigidum.

  Part of: Jia F, Liang Z, Fikáček M (2020) A review of Himalcercyon stat. nov., with description of a new species from the Chinese Himalaya and an updated key to Asian genera of Megasternini (Coleoptera, Hydrophilidae). Deutsche Entomologische Zeitschrift 67(1): 35-49.