Dewel, R. A. 2000. Colonial origin for Eumetazoa: Major morphological transitions and the origin of bilaterian complexity. J. Morph. 243, 35-74.
Finnerty, J. R., Pang, K., Burton, P., Paulson, D., and Martindale, M. Q. 2004. Origins of bilateral symmetry: Hox and Dpp expression in a sea anemone. Science 304, 1335-1337.
Jenner, R. A. 2004. When molecules and morphology clash: Reconciling conflicting phylogenies of the Metazoa by considering secondary character loss. Evol. Dev. 6, 372-378.
Minelli, A. 2003. The Development of Animal Form. Cambridge University Press.
Was this article helpful?