Ambulacraria
| Ambulacrarians Temporal range: Late Ediacaran - Recent |
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| Various sea stars and sea urchins among mussel shells in the rocky intertidal zone of Kachemak Bay. | |
| Scientific classification | |
| Kingdom: | Animalia |
| Subkingdom: | Eumetazoa |
| (unranked): | Bilateria |
| Superphylum: | Ambulacraria |
| Phyla | |
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Ambulacraria or Coelomopora is a clade of invertebrate phyla which includes echinoderms and hemichordates; a member of this group is called an ambulacrarian. The Ambulacraria are part of the Deuterostomes, a larger clade that also includes the Chordata and Vetulicolia.
The two living clades with representative organisms are:
The group Xenoturbellida (two species of worm-like animals) has previously been considered to be in this clade, but is now considered to be placed more basally among Metazoans.
Fossil taxa that may lie on the stem lineage:
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