Phylogeny deuterostome

Fig. 1.5. Phylogeny of the deuterostomes indicating position of oldest fossil taxa against the geological record. All neodermatans parasitize vertebrates and, if present, host associations represent historical associations the Neodermata must have parasitized the stem group Gnathostomata between the Cambrian and Ordovician. Tree redrawn from Rowe (2004).

Deuterostome phylogeny the context for the origin and evolution of the vertebrates... 

As noted by Peterson (1995), the only valid test of the calcichordate theory is phylogenetic. Peterson (1995) tested whether carpoid anatomy as interpreted by Jefferies would produce Jefferies own phylogeny for carpoids and other deuterostomes and found that it did not. Peterson concluded that as the phylogeny based on Jefferies own anatomical reconstructions of carpoids differed from that... 

Schaeffer, B. (1987) Deuterostome monophyly and phylogeny , Evolutionary Biology, 21, 179-235. 

Turbeville, J.M., Schulz, J.R. and Raff, R.A. (1994) Deuterostome phylogeny and the sister group of chordates evidence from molecules and morphology , Molecular Biology and Evolution, 11, 648-55. 

Figure 2.1 Deuterostome phylogeny. The relationship between hagfish and lampreys is controversial. In some molecular phylogenies (e.g. Mallatt and Sullivan 1998) lampreys and hagfish form a monophyletic clade.

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