Jesogammarus (Jesogammarus) ikiensis sp. n., holotype, male, 13.1 mm, NSMT-Cr 24107, Ishida, Iki, Nagasaki Prefecture, Japan. A maxilliped, dorsal view B outer plate of maxilliped, dorsal view C inner plate of maxilliped, dorsal view D gnathopod 1, medial view E palmar margin of propodus and dactylus of gnathopod 1, medial view F gnathopod 2, medial view G palmar margin of propodus and dactylus of gnathopod 2, medial view H coxal gill of gnathopod 2, medial view.