THIS is an interesting and thoughtful introduction to the morphology of the vertebrata, very clearly written, well illustrated, and with several distinctive features. The author thinks, probably with ...
Les vertébrés forment un sous-embranchement du règne animal. Ce taxon, qui dans sa version moderne exclut les myxines, est considéré comme monophylétique. Il appartient à l'embranchement des Chordés, ...
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