… Of the 17 species of Japanese salamanders, 14 belong to the Hynobius genus, but most are morphologically similar, with only slight differences in the number of ribs, tail shape, body color, and markings. The giant salamander Pachypalaminus ( Hynobius ) boulengeri (illustration), which is classified into a separate genus due to differences in skull structure, is found in the mountains of the Kii Peninsula, Shikoku, and Oita Prefecture, and is the largest species of Japanese salamander, reaching a total length of 16 to 20 cm, but is morphologically not very different from other species. The Japanese salamander Onychodactylus japonicus (illustration), found in the mountains of Honshu and Shikoku, is also large, reaching a total length of 15 to 19 cm, and is a stream-spawning type with a cylindrical tail that is more than half its total length, and lacks lungs. … *Some of the terminology that mentions "Pachypalaminus boulengeri" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 日本産サンショウウオ17種のうち14種はカスミサンショウウオ属Hynobiusに属するが,ほとんど形態的に類似し,わずかに種によって肋条の数,尾の形状あるいは体色,斑紋などが異なる。頭骨の構造の違いで別属に分けられるオオダイガハラサンショウウオPachypalaminus(=Hynobius) boulengeri(イラスト)は,紀伊半島・四国・大分県の山地に分布し,全長16~20cmに達する日本産サンショウウオの最大種であるが,形態的には他種と大差がない。本州・四国の山地に分布するハコネサンショウウオOnychodactylus japonicus(イラスト)も全長15~19cmと大きく,円筒状の尾が全長の1/2よりも長い渓流産卵型で,肺を欠く。… ※「Pachypalaminus boulengeri」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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