Jesogammarus uchiyamaryui sp. n., not preserved, precopula pair (male: upper, female: lower). Photographed by Ryu Uchiyama.

 
 
  Part of: Tomikawa K, Nakano T, Hanzawa N (2017) Two new species of Jesogammarus from Japan (Crustacea, Amphipoda, Anisogammaridae), with comments on the validity of the subgenera Jesogammarus and Annanogammarus. Zoosystematics and Evolution 93(2): 189-210. https://doi.org/10.3897/zse.93.12125