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 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 attenuatum Nemalion cari-cariense Nemalion helminthoides Nemalion longicolle Nemalion lubricum (type species) Nemalion multifidum Nemalion multifidum subsp. monoicum Nemalion perpusillum 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.468-469Smith, 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.