• Corpus ID: 29594186

Introduction to the Bilateria and the Phylum Xenacoelomorpha Triploblasty and Bilateral

@inproceedings{Xenacoelomorpha2016IntroductionTT,
  title={Introduction to the Bilateria and the Phylum Xenacoelomorpha Triploblasty and Bilateral},
  author={Phylum Xenacoelomorpha},
  year={2016}
}
long the evolutionary path from prokaryotes to modern animals, three key innovations led to greatly expanded biological diversification: (1) the evolution of the eukaryote condition, (2) the emergence of the Metazoa, and (3) the evolution of a third germ layer (triploblasty) and, perhaps simultaneously, bilateral symmetry. We have already discussed the origins of the Eukaryota and the Metazoa, in Chapters 1 and 6, and elsewhere. The invention of a third (middle) germ layer, the true mesoderm… 

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