Matsui Masafumi, Nishikawa Kanto, Tominaga Atsushi
1 Graduate School of Human and Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Kyoto 606-8501, Japan.
2 Department of Natural Sciences, Faculty of Education, University of the Ryukyus, Senbaru 1, Nishihara, Okinawa 903-0213, Japan.
Zoolog Sci. 2017 Dec;34(6):538-545. doi: 10.2108/zs170038.
Examination of the holotype of Hynobius stejnegeri Dunn, 1923 revealed that the species is identical with H. yatsui Oyama, 1947 , recently resurrected from H. naevius (Temminck and Schlegel, 1838). The name H. yatsui is therefore relegated to a subjective junior synonym of H. stejnegeri. The latter name, however, has been widely applied to an amber-colored or tortoise-shell salamander from Kyushu, southwestern Japan, which now requires a new name. We, thus, describe the ambercolored salamander as a new species Hynobius ikioi. The new species is phylogenetically very close to H. amakusaensis Nishikawa and Matsui, 2014 and H. osumiensis Nishikawa and Matsui, 2014 , both also from Kyushu, but is easily distinguished from them by its uniquely bi-colored dorsum.
对1923年邓恩命名的史氏小鲵（Hynobius stejnegeri Dunn）的正模标本进行检查后发现，该物种与1947年小山命名的八重山小鲵（H. yatsui Oyama）相同，八重山小鲵最近从云中小鲵（H. naevius (Temminck and Schlegel, 1838)）中重新划分出来。因此，八重山小鲵这个名称被降为史氏小鲵的一个主观同物异名。然而，史氏小鲵这个名称已被广泛用于指称来自日本西南部九州的一种琥珀色或龟壳色的蝾螈，现在它需要一个新名称。因此，我们将这种琥珀色蝾螈描述为一个新物种——伊氏小鲵（Hynobius ikioi）。这个新物种在系统发育上与同样来自九州的2014年西川和松井命名的天草小鲵（H. amakusaensis Nishikawa and Matsui）和大隅小鲵（H. osumiensis Nishikawa and Matsui）非常接近，但因其独特的双色背部很容易与它们区分开来。
