http://en.wikipedia.org/wiki/Animal
In addition to these, the deuterostomes also include the Hemichordata, or acorn worms.Although they are not especially prominent today, the important fossil graptolites may belong to this group.
The Chaetognatha or arrow worms may also be deuterostomes, but more recent studies suggest protostome affinities.
In addition to these, the deuterostomes also include the Hemichordata, or acorn worms.Although they are not especially prominent today, the important fossil graptolites may belong to this group.
The Chaetognatha or arrow worms may also be deuterostomes, but more recent studies suggest protostome affinities.
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