Nematoida

Nematoida

Nematoida

Clade of worm-like animals

Nematoida is a clade of pseudocoelomate free living or parasitic animals. It consists of phyla Nematoda and Nematomorpha.[2][3][4] The two groups share a number of features in common; the presense of a cloaca in both sexes, aflagellate sperm, and a cuticle made of collagen.[5]

Quick Facts Scientific classification, Phyla ...

Its position within Ecdysozoa is uncontroversial, but the identity of their closest relatives has been debated. Under the Cycloneuralia hypothesis, the nematoids are considered to be closest to Scalidophora, named for the ring-shaped brains found in these animals.[6] However, this group has seen less support in phylogenetic analyses, with the Cryptovermes hypothesis being more consistently supported[5][7][8], which groups the nematoids with the panarthropods, although the issue is still not completely settled.

References

  1. [1]
    Poinar, George (January 2008). "Palaeonema phyticum gen. n., sp. n. (Nematoda: Palaeonematidae fam. n.), a Devonian nematode associated with early land plants". Nematology. 10 (1): 9–14. doi:10.1163/156854108783360159.
  2. [2]
    "articulata". Archived from the original on 2010-05-10. Retrieved 2009-06-28.
  3. [3]
    Telford MJ, Bourlat SJ, Economou A, Papillon D, Rota-Stabelli O (April 2008). "The evolution of the Ecdysozoa". Philos. Trans. R. Soc. Lond. B Biol. Sci. 363 (1496): 1529–37. doi:10.1098/rstb.2007.2243. PMC 2614232. PMID 18192181.
  4. [4]
    Telford MJ, Bourlat SJ, Economou A, Papillon D, Rota-Stabelli O (April 2008). "The evolution of the Ecdysozoa". Philos. Trans. R. Soc. Lond. B Biol. Sci. 363 (1496): 1529–37. doi:10.1098/rstb.2007.2243. PMC 2614232. PMID 18192181.
  5. [5]
    Telford, Maximillian; et al. (11 January 2008). "The evolution of the Ecdysozoa". Philosophical Transactions. doi:10.1098/rstb.2007.2243. PMC 2614232.
  6. [6]
    Hejnol, Andreas (2015). "Cycloneuralia". Spinger Link. doi:10.1007/978-3-7091-1865-8_1.
  7. [7]
    Howard, Richard. "The Deep Evolution of Ecdysozoa". ProQuest.
  8. [8]
    Howard, Richard; et al. (10 March 2022). "The Ediacaran origin of Ecdysozoa: integrating fossil and phylogenomic data". Journal of the Geological Society. doi:10.1144/jgs2021-107. hdl:2445/186596.


Stub icon

This protostome-related article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Nematoida, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.