Maximum Likelihood tree of barcoding regions (partial codes of COI gene, 35 sequences, 612 bp including gaps). The numbers at branches indicate the Ultra-Fast Bootstrap values. "JP" means "Japanese" materials examined this time.

 
  Part of: Takayanagi T, Yoshizawa K (2021) The first record of Caenis rivulorum (Ephemeroptera: Caenidae) from Japan. Biodiversity Data Journal 9: e67413. https://doi.org/10.3897/BDJ.9.e67413