# Nemalion

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***Nemalion*** is a genus of [red algae](/source/Red_algae) that contains approximately ten species, including *N. helminthoides*.[1] Its members are known by a number of common names.[note 1] It is the source of the subclass name "Nemaliophycidae".

## Species

As of 2017, the species accepted taxonomically are:[2]

- *[Nemalion amoenum](/source/Nemalion_amoenum)*
- *[Nemalion attenuatum](/source/Nemalion_attenuatum)*
- *[Nemalion cari-cariense](/source/Nemalion_cari-cariense)*
- *[Nemalion helminthoides](/source/Nemalion_helminthoides)*
- *[Nemalion longicolle](/source/Nemalion_longicolle)*
- *[Nemalion lubricum](/source/Nemalion_lubricum)* ([type species](/source/Type_species))
- *[Nemalion multifidum](/source/Nemalion_multifidum)* - *[Nemalion multifidum subsp. monoicum](/source/Nemalion_multifidum_subsp._monoicum)*
- *[Nemalion perpusillum](/source/Nemalion_perpusillum)*
- *[Nemalion vermiculare](/source/Nemalion_vermiculare)*

## Description

Simple multiaxial frond, with a soft and gelatinous core.[3][4]

## Habitat

Marine, mainly littoral.[3]

## Notes

1. Recorded common names are threadweed, umisomen, tsukomo nori, crop of threads, sea noodles, tsukomo-nori, umisÔmen and umi-somen.

## References

1. Pérez Recalde, M.; Noseda, M. D.; Pujol, C. A.; Carlucci, M. J.; Matulewicz, M. C. (2009). "Sulfated mannans from the red seaweed *Nemalion helminthoides* of the South Atlantic". *Phytochemistry*. **70** (8): 1062–8. [Bibcode:2009PChem..70.1062P](https://ui.adsabs.harvard.edu/abs/2009PChem..70.1062P). [doi:10.1016/j.phytochem.2009.05.001](https://doi.org/10.1016/j.phytochem.2009.05.001). [hdl:11336/67863](https://hdl.handle.net/11336/67863). [PMID 19493552](https://pubmed.ncbi.nlm.nih.gov/19493552)

1. Guiry, M.D. & Guiry, G.M. (20 January 2017). ["Nemalion"](http://www.algaebase.org/search/genus/detail/?genus_id=s5c0afa0932ff003d). *[AlgaeBase](/source/AlgaeBase)*. World-wide electronic publication, National University of Ireland, Galway. Retrieved 21 June 2017.

1. Fritsch, F.E. 1965. *The Structure and Reproduction of the Algae. Volume 11*. p.468-469

1. Smith, G.M. 1955. *Cryptogamic Botany Volume 1. Algae and Fungi*

## Further reading

- Fritsch, F.E. 1965. *The Structure and Reproduction of the Algae.* pp. 468 - 469 Cambridge University Press
- Nicolson, D.H. & Norris, J.N. (1983). Ordinal orthography: Nemalionales vs. Nemaliales (Rhodophyta). *Taxon* 32: 288–292.

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Adapted from the Wikipedia article [Nemalion](https://en.wikipedia.org/wiki/Nemalion) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Nemalion?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.