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The Asiatic salamanders (family Hynobiidae) are primitive salamanders found all over Asia, and in European Russia. They are closely related to the giant salamanders (family Cryptobranchidae), with which they form the suborder Cryptobranchoidea. About half of hynobiids are unique to Japan.〔(Hasumi 2002).〕 Hynobiid salamanders practice external fertilization, or spawning. And, unlike other salamander families which reproduce internally, male hynobiids focus on egg sacs rather than females during breeding.〔(Hasumi, 2002).〕 The female lays two egg sacs at a time, each containing up to 70 eggs. Parental care is common. A few species have very reduced lungs, or no lungs at all. The tadpoles can sometimes have reduced external gills if they live in cold and very oxygen-rich water.〔Hasumi, M. (2002). About hynobiids. Retrieved May 8, 2005 from ().〕 ==Phylogeny== Cladograms based on the work of Pyron and Wiens (2011) and modified using Mikko Haaramo }} }} }} }} }} 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Asiatic salamander」の詳細全文を読む スポンサード リンク
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