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Urochordata

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

Urochordata (tunicates; phylum Chordata) Subphylum comprising the seasquirts, with reliable fossils from the Permian, and possible remains in Silurian sediments. Sea-squirts have tadpole-like larvae with notochords in their tails, a feature that links them with the chordates.

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AILSA ALLABY and MICHAEL ALLABY. "Urochordata." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 12 Nov. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Urochordata." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (November 12, 2009). http://www.encyclopedia.com/doc/1O13-Urochordata.html

AILSA ALLABY and MICHAEL ALLABY. "Urochordata." A Dictionary of Earth Sciences. 1999. Retrieved November 12, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Urochordata.html

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