Pseudis

Japanese: Pseudis
Pseudis

…The larvae usually metamorphose within 2–3 months, but some species overwinter as larvae. In some species, such as the upside-down frog Pseudis , the larvae (25 cm long) are much larger than the adults (7 cm long).
[Systematics and classification]
The distant ancestor of frogs is thought to be Miobatrachus , which branched off from labyrinthodont amphibians that flourished in the Triassic Period, and had a frog-like head and a long tail.

*Some of the terminology explanations that mention "Pseudis" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ふつう幼生は2~3ヵ月で変態するが,一部の種類では幼生のまま越冬する。アベコベガエル類Pseudisのように幼生(全長25cm)が成体(全長7cm)よりずっと大きなものもある。
【系統と分類】
 カエル類の遠い祖先型は,三畳紀に栄えた両生類の迷歯類から分岐したミオバトラクスMiobatrachusなどと考えられ,カエルのような頭と長い尾をもっていた。…

※「Pseudis」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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