Abstract

Two salamanders endemic to Taiwan, Hynobius sonani and Hynobius formosanus, are similar to Japanese hynobiids in having 2n = 58 chromosomes and by the absence of a medium-sized telocentric pair. H. sonani has 6 metacentric and 10 telocentric microchromosome pairs, while H. formosanus has 5 metacentric and 11 telocentric microchromosome pairs. The karyotype of H. sonani is nearly identical to that of the Japanese hynobiid salamander H. boulengeri. Karyophylogenetic relationships among forms of mountain-stream type hynobiids of Taiwan and Japan are discussed.

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