OKADA, RYOHEI, Coleopterological Society of Japan. National Museum of Nature and Science, Tsukuba, 3050005 Japan.

• Zootaxa Vol. 4646 No. 3: 25 Jul. 2019 - Article
  

  Description of the larvae of four Japanese Platambus Thomson, 1859 (Coleoptera: Dytiscidae: Agabinae) with phylogenetic considerations

  
  Abstract  PDF (4MB)
• Zootaxa Vol. 4820 No. 1: 27 Jul. 2020 - Article
  

  Description of the immature stages of the endangered Japanese endemic Oreodytes kanoi (Kamiya, 1938) (Coleoptera: Dytiscidae: Hydroporinae) and comparison with the known larvae of Oreodytes Seidlitz, 1887

  
  Abstract  PDF (2MB)