Urmetazoan

（重定向自Placula）

Maximum Likelihood Phylogenetic Tree of Metazoan Relationships

The Urmetazoan is the hypothetical last common ancestor of all animals. It was undoubtedly marine, but beyond this its form is difficult to determine; five different hypotheses have been put forward, and discriminating between them is difficult because the relationships of animal phyla are not completely resolved.

单词	Placula
释义	Placula 英语百科 Urmetazoan （重定向自Placula） The Urmetazoan is the hypothetical last common ancestor of all animals. It was undoubtedly marine, but beyond this its form is difficult to determine; five different hypotheses have been put forward, and discriminating between them is difficult because the relationships of animal phyla are not completely resolved.
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