Caenis rivulorum: a. habitus, male (specimen from Loc. 1, scale: 1 mm); b. habitus, female (specimen from Loc. 2, scale: 1 mm).

 
  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