Craniata is a Phylum, (scientific classifacation), It means that
an organism has a skull, or cranium that contains the brain.
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Craniata
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I believe that Craniatamoreaccuratelydescribes the group
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Urochordata, represented by tunicates; Cephalochordata,
represented by lancelets; and Craniata, which includes
Vertebrata.
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Freshwater and saltwater fish are in the same phylum that we
are, and reptiles and amphibians and birds are in; phylum chordata,
subphylum craniata, subphylum vertebrata.