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Ambulacraria

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Ambulacrarians
Temporal range: Late Ediacaran - Recent
Scientific classification
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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 phyla with representative organisms are:

The phylum 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.[1]

Fossil taxa that may lie on the stem lineage:

References

  1. ^ Edgecombe, Gregory D.; Giribet, Gonzalo; Dunn, Casey W.; Hejnol, Andreas; Kristensen, Reinhardt M.; Neves, Ricardo C.; Rouse, Greg W.; Worsaae, Katrine; Sørensen, Martin V. (2011). "Higher-level metazoan relationships: recent progress and remaining questions.". Organisms, Diversirt and evolution. doi:10.1007/s13127-011-0044-4. 
  2. ^ a b Caron, J.; Conway Morris, S.; Shu, D.; Soares, D. (2010). Soares, Daphne, ed. "Tentaculate fossils from the Cambrian of Canada (British Columbia) and China (Yunnan) interpreted as primitive deuterostomes". PLoS ONE 5 (3): e9586. PMC 2833208. PMID 20221405. doi:10.1371/journal.pone.0009586.  edit