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Ambulacrarians
Fossil range: Late Ediacaran - Recent
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

Ambulacraria is a clade of invertebrates which includes echinoderms, hemichordates, and Xenoturbellida; a member of this group is called an ambulacrarian. This superphylum is largely identical to the superphylum Deuterostomia, except the phylum Chordata is not found in Ambulacraria.

The three living phyla, with representative organisms, are:

Fossil taxa with unclear placement:

  •  ?Superphylum Ambulacraria
    • Herpetogaster Caron, Conway Morris & Shu, 2010[1] - with one species: † Herpetogaster collinsi Caron, Conway Morris & Shu, 2010[1]

References

  1. ^ a b Caron J.-B., Conway Morris S. & Shu D. (2010). "Tentaculate Fossils from the Cambrian of Canada (British Columbia) and China (Yunnan) Interpreted as Primitive Deuterostomes". PLoS ONE 5(3): e9586. doi:10.1371/journal.pone.0009586
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