Prehistoric Vertebrates and Prehistoric Invertebrates /
Acanthostega (meaning Spiny Roof) is an extinct labyrinthodont genus, among the first vertebrate animals to have recognizable limbs. It appeared in the Upper Devonian (Famennian) about 365 million years ago, and was anatomically intermediate between lobe-finned fishes and the first tetrapods fully c...
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| 格式: | software, multimedia |
| 語言: | eng |
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Delhi, India : White Word Publications,
2012
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