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Thesaurus Term : Chordata

Scope note
The phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals. A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord.
Chordata
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