Nematochrysis Pascher, 1925

Holotype species: Nematochrysis sessilis (Pascher) Pascher

Original publication and holotype designation: Pascher, A. (1925). Die braune Algenreihe der Chrysophyceen. Archiv für Protistenkunde 52: 489-564, 56 figures, plate 15.

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Description: Thallus an unbranched uniseriate filament, fixed with a colorless basal cell to a substratum. Cells cylindrical with 1-2 parietal chloroplasts. Vegetative division oblique (45%), then the daughtercells arrange themselves longitudinally. Swarmers arebiflagellate of Ochromonas type, formed directly from aprotoplast. They have a stigma, but no contractile vacuoles. Stomatocysts and palmella stages are known. Marine, found along British and Adriatic coasts. One species, N. hieroglyphia Waern, has been transferred to Chrysowaernella.The taxonomic position of the two other species may be questioned.

Information contributed by: J. Kristiansen. The most recent alteration to this page was made on 2023-10-10 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Graf, L., Yang, E.C., Han, K.Y., Küpper, F.C., Benes, K.M., Oyadomari, J.K., Herbert, R.J.H., Verbruggen. H., Wetherbee, R., Andersen R.A. & Yoon, H.S. (2020). Multigene phylogeny, morphological observation and re-examination of the literature lead to the description of the Phaeosacciophyceae classis nova and four new species of the heterokontophyta SI clade. Protist 171(125781): 1-25, 10 figs, 1 table.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=44775

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 October 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024