basal bilaterian clade of small and very simple animals

Xenacoelomorpha is a proposed grouping of the xenoturbellids and acoelomorph flatworms, suggested by molecular data.[2] It may be a member of the deuterostomes, [3] and may be even more basal in the Bilateria.

Xenoturbella japonica, a xenacoelomorph member (xenoturbellids)
Proporus sp., another xenacoelomorph member (acoelomorphs)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Subkingdom: Eumetazoa
Clade: ParaHoxozoa
Clade: Bilateria
Phylum: Xenacoelomorpha
Philippe et al. 2011[1]

References change

  1. Tyler, S.; Schilling, S.; Hooge, M.; Bush, L.F. (2006–2016). "Xenacoelomorpha". Turbellarian taxonomic database. Version 1.7. Archived from the original on 2019-02-09. Retrieved 2016-02-03.
  2. Philippe H. et al. 2011. Acoelomorph flatworms are deuterostomes related to Xenoturbella. Nature 470 (7333): 255-258 [1]
  3. Perseke M. et al 2007. The mitochondrial DNA of Xenoturbella bocki: genomic architecture and phylogenetic analysis. Theory Biosci. 126 (1):35-42. Available on-line at [2] Archived 2019-04-24 at the Wayback Machine