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Chordata (Phylum) - chordates ..[Acrania] (Subphylum) ..[Acraniata] (Subphylum) ..[Agnatha] (Subphylum) ..[†Arthrodira] (Class) - arthrodires ..[†Calcichordata] (Subphylum) ..[Cephalochordata] - cephalochordates ..Cephalochordata (Subphylum) - lancelets ..[†Conodonta] (Subphylum) ..Conodontophorida (Subphylum) ..[Craniata] (Subphylum) ..[Craniota] ..[Gnathostomata] (Subphylum) ..[Hemichordata] (Subphylum) ..[Marsipobranchii] (Class) ..[Myxini] (Subphylum) ..[Olfactores] ([unranked]) ..[†Ostracophori] (Class) ..[Pisces] (Class) ..[Tunicata] (Class) ..[Tunicata] (Subphylum) - tunicates ..Urochordata (Subphylum) - tunicates ..Vertebrata (Subphylum) - vertebrates ..†Pikaia (Genus) ....†Pikaia gracilens (Species)

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Last updated: 1 Feb 2024