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<td>Animalia <tr><td>Phylum:<td>Chordata <tr><td>Subphylum:<td>Urochordata <tr><td>Class:<td>Ascideiacea </table> <tr><th bgcolor=pink>Orders <tr><td> Aplousobranchia
Enterogona
Phlebobranchia
Pleurogona
Stolidobranchia </table> Ascidiacea (commonly known as the ascidians) is an order in the Urochordata subphylum of sac-like marine filter feeders. They are characterized by a tough outer "tunic" made of the polysaccharide tunicin whilst other tunicates are much less robust. Whilst adults are sessile (immobile), larvae resemble tadpoles and swim up and down in their marine environment.

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References

Colin Tudge (2000). The Variety of Life. Oxford University Press. ISBN 0198604262.

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<tr><th bgcolor=pink>Scientific classification <tr><td>

Ascidiacea

<tr><td>Kingdom:

This page was last modified 19:29, 25 Aug 2004.

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