Phylogenetic Classification of Deuterostome Animals
Phylogenetic groups above phylum
Deuterostomia
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Echinodermata
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Asteroidea
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Ophiuroidea
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Echinoidea
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Holothuroidea
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Crinoidea
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Hemichordata
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Enteropneusta
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Pterobranchia
(several recent authors raise the two classes of hemichordates to phylum
level)
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Chordata
-
Urochordata (some authors suggest making this a separate phylum, based
on tunic and lack of myomeres)
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Larvacea
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Ascidiacea (appears paraphyletic in recent molecular phylogenies, with
some orders closer to thaliaceans than to other ascidiaceans)
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Thaliacea
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Cephalochordata
(3rd subphylum, Craniata, is excluded from this course)
Maintained by Sam Mozley (click
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Last modified on January 5, 2004