目次

1. Deuterostomes and Chordates 2. Hypotheses on Chordate Origins 3. Fossil Records 4. Molecular Phylogeny 5. Comparative Genomics of Deuterostomes 6. The Origins of Chordates 7. The New Organizers Hypothesis for Chordate Origins 8. The Dorsoventral-Axis Inversion Hypothesis: The Embryogenetic Basis for the Appearance of Chordates 9. The Enteropneust Hypothesis and Its Interpretation 10. Chordate Evolution: An Extension of the New Organizers Hypothesis 11. How Did Chordates Originate and Evolve? 12. Summary and Perspective