Tetrápodos: Diferenzas entre revisións

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=== Ligazóns externas ===
* [https://web.archive.org/web/20100125062701/http://www.ucmp.berkeley.edu/vertebrates/tetrapods/tetraintro.html UCMP Taxonomy page]
* [http://news.softpedia.com/news/How-did-fish-grow-legs-15424.shtml How did fish grow legs?]
* [http://www.livescience.com/animalworld/060119_breathing_ears.html Human Ears Evolved from Ancient Fish Gills]