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A Chromosome spreads prepared from intestinal epithelium of H.fucus immature juvenile, unknown sex. Diploid chromosome numbers are 2n = 58. This chromosome number is characteristic of many stream-type species of the genus Hynobius. B Karyotype with Giemsa-stained chromosomes. Chromosome constitutions are as follows, macro: 13 bi-armed 0 uni-armed; micro: 6 bi-armed 10 uni-armed. Scale bars: 10 μm (A, B).
