棘螈（Acanthostega）：有八趾的脚。鱼石螈（Ichthyostega）：有脚。 提塔利克鱼是一种过度性化石，它在四足类生物的地位就像是始祖鸟一样。
基于3666个网页-相关网页
... IX 离子交换 Ichthyostega 鱼石螈属 Icriodella 小贝牙形石属 ...
基于70个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
They also discovered the earliest known evidence of a breastbone in Ichthyostega.
BBC: Science & Environment
The very early four-legged land vertebrates, such as Acanthostega and Ichthyostega, that dragged themselves from the muddy waters on to land had five, six, seven, even eight fingers.
BBC: Mystery of mole's second thumb solved
应用推荐
模块上移
模块下移
不移动
