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[Current view on tetrapod's origin and diversification].

For the last few decades a wealth of evidence have been obtained (including new fossils, and new nucleotide sequences) which provide a way of revising the current evolutionary theories. The primary structures of a number of orthological regions from a variety of genomes have been evaluated. Full sized genomic sequences for some organisms, have been detected. This review is devoted to modern concepts of the tetrapod's rise and diversification, and of the contemporary vertebrates' class formation.