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两栖动物的演化支 来自维基百科,自由的百科全书
块椎类(Rhachitomi)是一类离片椎目两栖动物,得名于其尚未愈合的间椎体与侧椎体,包括大部分的离片椎目动物,如双顶螈科(Dissorophidae),引螈科(Eryopidae),先驱螈科(Archegosauridae)等,以及全椎类和现存的滑体亚纲(青蛙,蝾螈等) 下图为该演化支下级分类:
离片椎类 |
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