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The Platytrochozoa are proposed basal clade of spiralian animals as sister group of the Gnathifera. The Platytrochozoa were divided into the Rouphozoa and the Lophotrochozoa.[1] A more recent study suggests that the mesozoans also belong to this group of animals, as sister of the Rouphozoa.[2]

Platytrochozoa
Scientific classification e
Kingdom: Animalia
(unranked): Spiralia
Clade: Platytrochozoa
Struck et al. 2014
clade


Spiralia

Gnathifera

Platytrochozoa
Rouphozoa

Gastrotricha

Platyhelminthes

Mesozoa

Lophotrochozoa

An alternative phylogeny was given in 2019, with a basal grouping Molusca with Entoprocta grouping named Tetraneuralia, and a second grouping of Nemertea with Platyhelminthes named Parenchymia as sister of Annelida. In their proposal, Lophotrochozoa would become roughly synonymous with Platytrochozoa, and Rouphozoa is unsupported.[3]

ReferencesEdit

  1. ^ Struck, Torsten H.; Wey-Fabrizius, Alexandra R.; Golombek, Anja; Hering, Lars; Weigert, Anne; Bleidorn, Christoph; Klebow, Sabrina; Iakovenko, Nataliia; Hausdorf, Bernhard (2014-07-01). "Platyzoan Paraphyly Based on Phylogenomic Data Supports a Noncoelomate Ancestry of Spiralia". Molecular Biology and Evolution. 31 (7): 1833–1849. doi:10.1093/molbev/msu143. PMID 24748651.
  2. ^ Lu, Tsai-Ming; Kanda, Miyuki; Satoh, Noriyuki; Furuya, Hidetaka (2017). "The phylogenetic position of dicyemid mesozoans offers insights into spiralian evolution". Zoological Letters. 3 (1): 6. doi:10.1186/s40851-017-0068-5. PMC 5447306. PMID 28560048.
  3. ^ Rokhsar, Daniel S.; Satoh, Noriyuki; Goto, Taichiro; Peijnenburg, Katja T. C. A.; Marlétaz, Ferdinand (2019-01-10). "A New Spiralian Phylogeny Places the Enigmatic Arrow Worms among Gnathiferans". Current Biology. 0 (2): 312–318.e3. doi:10.1016/j.cub.2018.11.042. ISSN 0960-9822. PMID 30639106.