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

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Last updated: 28 Aug 2026