''Nemalion'' is a genus of
red algae
Red algae, or Rhodophyta (, ; ), are one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. The majority ...
that contains approximately ten species, including ''N. helminthoides''.
Its members are known by a number of common names.
[Recorded common names are threadweed, umisomen, tsukomo nori, crop of threads, sea noodles, tsukomo-nori, umisÔmen and umi-somen.] It is the source of the subclass name "Nemaliophycidae".
Species
As of 2017, the species accepted taxonomically are:
*''
Nemalion amoenum
''Nemalion'' is a genus of red algae that contains approximately ten species, including ''N. helminthoides''. Its members are known by a number of common names.Recorded common names are threadweed, umisomen, tsukomo nori, crop of threads, sea no ...
''
*''
Nemalion attenuatum''
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Nemalion cari-cariense''
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Nemalion helminthoides
''Nemalion helminthoides'' is a small marine alga in the division Rhodophyta.
Description
This is a fairly large erect alga which grows to no more than 0.4 m long. The frond is erect with a solid axis. It is very mucilaginous and with few branc ...
''
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Nemalion longicolle''
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Nemalion lubricum'' (
type species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...
)
*''
Nemalion multifidum
''Nemalion'' is a genus of red algae that contains approximately ten species, including ''N. helminthoides''. Its members are known by a number of common names.Recorded common names are threadweed, umisomen, tsukomo nori, crop of threads, sea no ...
''
**''
Nemalion multifidum subsp. monoicum''
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Nemalion perpusillum''
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Nemalion vermiculare''
Description
Simple multiaxial frond, with a soft and gelatinous core.
[Fritsch, F.E. 1965. ''The Structure and Reproduction of the Algae. Volume 11''. p.468-469][Smith, G.M. 1955. ''Cryptogamic Botany Volume 1. Algae and Fungi'']
Distribution
Habitat
Marine, mainly littoral.
Notes
References
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.
Red algae genera
{{rhodophyta-stub