Fig. 1

Map of the Ryukyu Archipelago and sampling sites of Luciogobius ryukyuensis: A, Aritsu River; B, Teima River; C, Genka River; D, Nishiyabu River; E. Urachi River; F, Ôura River; G, creeks on Nagura Bay; H, Honera River; I, Aira River.

Map of the Ryukyu Archipelago and sampling sites of Luciogobius ryukyuensis: A, Aritsu River; B, Teima River; C, Genka River; D, Nishiyabu River; E. Urachi River; F, Ôura River; G, creeks on Nagura Bay; H, Honera River; I, Aira River.