Xenacoelomorpha (/ˌzɛnəˌsɛloʊˈmɔːrfə/) is a small phylum of bilaterian invertebrate animals, consisting of two sister groups: xenoturbellids and acoelomorphs...

acoelomorphs were placed in phylum Xenacoelomorpha, together with the xenoturbellids, and the sister relationship between Xenacoelomorpha and Nephrozoa confirmed...

together sometimes are called the lower deuterostomes.) Whether the Xenacoelomorpha clade is the sister group to the Ambulacraria remains a contentious...

Kimberella. Deuterostomia and Protostomia, together with their outgroup Xenacoelomorpha, constitute the large infrakingdom Bilateria, i.e. animals with bilateral...

bilaterians other than Xenacoelomorpha. It contrasts with the Xenambulacraria hypothesis, which instead posits that Xenacoelomorpha is most closely related...

chordates, the latter of which contains the vertebrates. The simple Xenacoelomorpha have an uncertain position within Bilateria. Animals first appear in...

ParaHoxozoa: Placozoa, Cnidaria, Bilateria/Triploblast Bilateria: Xenacoelomorpha, Nephrozoa Nephrozoa: Protostomes, Deuterostomes Phylum Proarticulata...

sister phylum of the Chordates. Chordata, Ambulacraria, and possibly Xenacoelomorpha are believed to form the superphylum Deuterostomia, although this has...

Xenoturbellida is the sister group to acoelomorphs, constituting the so-called Xenacoelomorpha clade. The close evolutionary relationship between Acoelomorpha and...

this hypothesis, Centroneuralia would be sister to Xenambulacraria (Xenacoelomorpha + Ambulacraria) at the base of Bilateria. Centroneuralia, as a proposed...

schizocoely typically occurs in them. Together with the Deuterostomia and Xenacoelomorpha, these form the clade Bilateria, animals with bilateral symmetry, anteroposterior...

Xenoturbella and Acoelomorpha. This clade was named Xenacoelomorpha. The monophyly of Xenacoelomorpha soon became established, but its position as either...

before deepening to become a blind gut. This is consistent with living Xenacoelomorpha, which are the sister taxon to protostomes and deuterostomes. The story...

of animals with bilateral symmetry as an embryo, consisting of the Xenacoelomorpha (i.e., Xenoturbella and acoelomorphs) and the Ambulacraria (i.e., echinoderms...

Xenacoelomorpha  Nephrozoa ...

Bilateria is an extremely diverse group of animals containing a vast majority of its species, largely due to the enormous amount of arthropods. This article...

small and simple invertebrates in the subphylum Acoelomorpha of phylum Xenacoelomorpha, a deep branching bilaterian group of animals, which resemble flatworms...

more ganglia in others. The Acoela are basal bilaterians, part of the Xenacoelomorpha. They are small and simple animals, and have very slightly more nerve...

Comb jellies (Ctenophora) Medusozoans and corals (Cnidaria) Acoels (Xenacoelomorpha) Flatworms (Platyhelminthes) Bristleworms, earthworms and leeches (Annelida)...

due to dorso-ventral flattening. Flatworms Micrognathozoa Mesozoa Xenacoelomorpha Gastrotricha, traditionally viewed as blastocoelomates Entoprocta,...

Julian; Ronquist, Fredrik; Jondelius, Ulf; Hejnol, Andreas (2016). "Xenacoelomorpha is the sister group to Nephrozoa". Nature (Submitted manuscript). 530...

Xenacoelomorpha Nephrozoa 650 mya...

systematic errors affects phylogenetic placement of Ctenophora and Xenacoelomorpha". Science Advances. 6 (50): eabc5162. Bibcode:2020SciA....6.5162K....

Smith, J.; Ronquist, F.; Jondelius, U.; Hejnol, A. (4 February 2016). "Xenacoelomorpha is the sister group to Nephrozoa". Nature. 530 (7588): 89–93. Bibcode:2016Natur...

Xenacoelomorpha Nephrozoa 650 mya...

February 2016). "New deep-sea species of Xenoturbella and the position of Xenacoelomorpha". Nature. 530 (7588): 94–97. Bibcode:2016Natur.530...94R. doi:10.1038/nature16545...

during this period, including cnidarians and early bilaterians such as Xenacoelomorpha, as well as mollusc-like Kimberella. Hard-bodied organisms with mineralized...

Effects of Systematic Errors Supports Sister-Group Relationship between Xenacoelomorpha and Ambulacraria". Current Biology. 29 (11): 1818–1826.e6. doi:10.1016/j...

Convolutidae is a family of acoels, belonging to the phylum Xenacoelomorpha. This family contains more than a third of all known acoel species. The family...

Echinodermata phyla, all of which are found in marine environments. In the Xenacoelomorpha, a phylum of bilaterally symmetrical animals, members of the subphylum...