| Parenchymia | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Clade: | Bilateria |
| Clade: | Nephrozoa |
| (unranked): | Protostomia |
| (unranked): | Spiralia |
| Superphylum: | Lophotrochozoa |
| Clade: | Parenchymia |
| Phyla | |
Parenchymia is a proposed clade encompassing Nemertea and Platyhelminthes. The clade was suggested in a 2019 study showing the clade as a sister to Annelida, with both groups together being sister to Lophophorata. The synapomorphies include similar organization of ciliary bands in the larva of both groups, as well as a lack of chitin, and is named for the abundant parenchyma found between the body wall and internal organs of both.[1] A similar taxon, with Mollusca being likewise linked together with Symbion and Entoprocta, has been proposed in a clade called Tetraneuralia.[2]
- ^ Marlétaz, Ferdinand; Peijnenburg, Katja T.C.A.; Goto, Taichiro; Satoh, Noriyuki; Rokhsar, Daniel S. (2019-01-21). "A New Spiralian Phylogeny Places the Enigmatic Arrow Worms among Gnathiferans" (PDF). Current Biology. 29 (2): 312–318.e3. doi:10.1016/j.cub.2018.11.042. ISSN 0960-9822. PMID 30639106. S2CID 58562919.
- ^ Bleidorn, Christoph (2019-08-22). "Recent progress in reconstructing lophotrochozoan (spiralian) phylogeny". Organisms Diversity & Evolution. 19 (4). Springer Science and Business Media LLC: 557–566. doi:10.1007/s13127-019-00412-4. ISSN 1439-6092. S2CID 201283619.