Frogs - Frogs

Japanese: カエル亜目 - かえるあもく
Frogs - Frogs

…Extant species are classified mainly on the basis of differences in skeletal features such as the skull, vertebrae, and pectoral girdle, as well as external characteristics, with approximately 2,600 species divided into 22 families. They are broadly divided into relatively primitive groups (suborder Anura) and relatively new groups (suborder Anura). The suborder Anura includes the Leiopelmatidae of New Zealand, which retain only vestigial tail muscles in adults, and the Ascaphidae of the northwestern United States.

*Some of the terminology that refers to the suborder "Anura" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…現生種は主として頭骨,脊椎骨,胸帯などの骨格や外部形質の違いで分類され,約2600種が22科に分けられる。それらは比較的原始的なグループ(ムカシガエル亜目)と,比較的新しいグループ(カエル亜目)に大別される。 ムカシガエル亜目には成体に尾を動かす筋肉が痕跡的に残存するニュージーランド産のリオペルマ科Leiopelmatidaeと,アメリカ合衆国北西部産のオガエル科Ascaphidaeとがまずあげられる。…

※「カエル亜目」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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