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Review
. 2000 Apr 25;97(9):4453-6.
doi: 10.1073/pnas.97.9.4453.

The New Animal Phylogeny: Reliability and Implications

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Free PMC article
Review

The New Animal Phylogeny: Reliability and Implications

A Adoutte et al. Proc Natl Acad Sci U S A. .
Free PMC article

Abstract

DNA sequence analysis dictates new interpretation of phylogenic trees. Taxa that were once thought to represent successive grades of complexity at the base of the metazoan tree are being displaced to much higher positions inside the tree. This leaves no evolutionary "intermediates" and forces us to rethink the genesis of bilaterian complexity.

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Figure 1
Figure 1
Metazoan phylogenies. (A) The traditional phylogeny based on morphology and embryology, adapted from Hyman (11). (B) The new molecule-based phylogeny. A conservative approach was taken in B: i.e., some datasets provide resolution within some of the unresolved multifurcations displayed, but we have limited the extent of resolution displayed to that solidly provided by rRNA only.

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