Aedeagi: A. Agraphydrus dapengensis sp. nov.; B. Agraphydrus komareki sp. nov.; C. Agraphydrus pseudoniger sp. nov.; D. Agraphydrus sabulosus sp. nov.

  Part of: Yang Z-m, Jia F, Jiang L, Guo Q (2021) Four new species of Agraphydrus R├ęgimbart, 1903 with additional faunistic record from China (Coleoptera, Hydrophilidae, Acidocerinae). Deutsche Entomologische Zeitschrift 68(1): 189-205.