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Title
Description of Callistethus hamus sp. nov. (Coleoptera, Scarabaeidae, Rutelinae) from continental Southeast Asia using synchrotron to illustrate the aedeagus.
A new species, Callistethus hamus Lu & Zorn, sp. nov., is described from China, Laos, and Vietnam. Additionally, we used synchrotron (Shanghai Synchrotron Radiation Facility) to scan the aedeagus. The virtual 3D model of the aedeagus is reconstructed and provided.