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Phylum-Chordata is divided into sub-phyla namely |
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a) |
Vertebrata, Protochordata and Urochordata |
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b) |
Urochordata, Gnathochordata and Vertebrata |
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c) |
Urochordata, Tunicata and Vertebrata |
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d) |
Tunicata, Cephalochordata and Vertebrata |
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Phylum-Chordata is divided into sub-phyla namely |
|
|
a) |
Vertebrata, Protochordata and Urochordata |
|
b) |
Urochordata, Gnathochordata and Vertebrata |
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c) |
Urochordata, Tunicata and Vertebrata |
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d) |
Tunicata, Cephalochordata and Vertebrata |
(d)
Phylum-Chordata is divided into three sub-phyla-Urochordata, Cephalochordata and Vertebrata. Urochordata is also called as Tunicata. Urochordata and Cephalochordata are also called as Protochordata