樺太産山椒魚に就いて
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概要
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An interesting salamander abundant in the streams of Sakhalin, has hitherto drawn little attention of observers. It was, for first time, identified by NIKOLSKI (1905) with Salamandrella keyserlingii DYBOWSKY, spreading extensively over the Asiatic continent. STEJNERGER (1907) confirms this view of NIKOLSKI and gives exact diagnosis based on the specimens of the S.U. Natural Museum (No.22594) collected from Kamchatka. The publication of his work (1907) attracted the attention of several authors such as TAGO (1097), HASHIMOTO (1910), V.KUHNE (1910) and others, who worked on this form conjunction with other amphibians from Japan proper, having added but little to our knowledge of it. ANDERSSON (1917) regards, on the contrary, the specimen collected from Sakaehama, on the east coast of Sakhalin, as a distinct species, Salamandrella cristatus. In his recently published work on Janpanese urodeles (1923), DUNN basing on the specimens from kamchatka, has made the two species referred to, Salamandrella keyserlingii DYB. and S.cristatus AND., as a single species, Hynobius cristatus (AND). Last spring I obtained four full-grown specimens of salamander, two of which are collected at Oodomari, a seaside town on the coast of the Aniva Bay, and the two others at Sakaehama where the specimen of ANDERSSON came from. The following diagnosis is based on these four specimens: Vomero-palatine teeth in [figure] series; costral grooves 13-14; 4 fingers 2, 3, 1, 4 in order of length and 4 toes, 3, 2, 4, 1 in order of length; without claw and web; vent a mere longitudinal slit in both female and male; tail oval at the base, flattened posteriorly; high dorsal fin bordering the whole length, ventral fin present only on 2/3 hinder part of tail; a tawny-olive coloured broad dorsal band bifurcates on the head, bordered with a blackish streak on each side; a mid-dorsal line of dotted black spots; below pale mottled with dusky spots. There is little room for doubt that the specimens just described represent the same species as those dealt with by STEJNERGER (U.S.N.M.No.22594) and DUNN (U.S.N.M.No.36414), all being collected from Kamchatka. Now the salamander occuring so abundantly in Sakhalin is represented by the single species, so far as explored, and this is no other than Salamandrella keyserlingii DYB. It is reported by DYBOWSKI (1870), NIKOLSKI (1905), STEJMERGER (1907, 1925), DUNN (1923) and others, that this species is common in the Ural Mts., Kirghiz Steppes, Baikal, Manchuria, Kamchatka, etc. Accordingly distribution of this species extends the whole northern Asia sa far as Sakhalin, that is its southern limit; beyond the Soya Strait (La Perouse St.) it is replaced by Hynobius, which is widely-spread in the whole Japan. The present case therefore supports the view maintained by Professor HATTA (1913) as to the zoo-geogrophical demarkation of the Soya Strait.
- 社団法人日本動物学会の論文
- 1925-12-15
著者
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