All this suggests the deuterostomes and protostomes are separate, monophyletic Lineages.

http://en.wikipedia.org/wiki/Animal

All this suggests the deuterostomes and protostomes are separate, monophyletic lineages. The main phyla of deuterostomes are the Echinodermata and Chordata.The former are radially symmetric and exclusively marine, such as starfish, sea urchins, and sea cucumbers.The latter are dominated by the vertebrates, animals with backbones.These include fish,amphibians, reptiles, birds, and mammals.