Plants and Animals

What is the third invertebrate group?

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A third invertebrate group, comprising the acorn worms and their relatives, shows affinities with chordates and has sometimes been considered a chordate subphylum, but is now often classified in a phylum of its own, the Hemichordata .

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Get more facts and information about Chordata . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

Similar questions: Is the Hemichordata the third invertebrate group? What is the Hemichordata? Is there a third invertebrate group? [ Hide these questions ]

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