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Nature 395, 792-794 (22 October 1998) | doi:10.1038/27421;
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Osteolepiforms and the ancestry of tetrapods
Fossil discoveries and improved phylogenies, have greatly improved our understanding of the origin of tetrapods, making it possible to reconstruct sequences of character change leading to tetrapod morphologies, and to tentatively identify the genetic basis for some of these changes,. However, progress has centred on the upper part of the Tetrapodomorpha which is occupied by Devonian tetrapods such as Acanthostega,, and Ichthyostega.
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