Denison, R. H. Feeding mechanisms of Agnatha and early gnathostomes. Am. Zool. 1, 177–181 (1961). Google Scholar Gans, C. Stages in the origin of vertebrates: analysis by means of scenarios. Biol. Rev. 64, 221–268 (1989). CAS PubMed Google Scholar Mallatt, J. Ventilation and the origin of jawed vertebrates: a new mouth. Zool. J. Linn. Soc. 117, 329–404 (1996). Google Scholar …
Read More »