With the R-banding (RBA) technique13) improved for the genus
Hynobius (RBG), 11) R-banding patterns in
Hynobius lichenatus and
H.
tokyoensis were obtained. The former species was collected in Inawashiro (Fukushima) and Shiobara (Tochigi), and the latter was collected in Isumi (Chiba) and Utsunomiya (Tochigi) in Japan. According to the R-banding patterns, three chromosome variations in
H. lichenatus and one chromosome variation in
H. tokyoensis were detected. It is considered that these variations show the inter-populational relationships in each species.
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