| urochordata | A subphylum of chordates intermediate between the invertebrates and the true vertebrates. (12 Dec 1998) |
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Synonyms : Ascidians, Tunicates, Urochordates
| Urochordata |
a subphylum of chordates intermediate between the invertebrates and true vertebrates, including the sea squirts and their allies, the members of which have a saclike body and a leathery tunic; the notochord is present only during the larval stage. Called also Tunicata.
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| urochordata | tunicates |
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