Classification of Brusca et al. 2016

Unr. Deuterostomia Grobben 1908
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Ph. Chordata Haeckel 1874
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Subph. Cephalochordata Haeckel 1866 [lancelet]
Unr. †Olfactores Jefferies 1991
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Subph. Urochordata Lankester 1877
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Invalid names: Tunicata Lamarck 1816 [synonym]
Subph. Vertebrata Lamarck 1801 [vertebrate]