Trichodiscus E.J.Welsford, 1912

Holotype species: Trichodiscus elegans E.J.Welsford

Original publication and holotype designation: Welsford, E.J. (1912). The morphology of Trichodiscus elegans, gen. et sp. nov. Annals of Botany 26: 239-243.

Description: Plants discoid and cushion-like, heterotrichous, consisting of branched, uniseriate filaments. Prostrate filaments radiating, united to form a central pseudoparenchymatous disc and free at margin. Short erect filaments and colourless (above base) multicellular hairs arise from centre of thallus. Cells uninucleate, with lobed, parietal chloroplast and pyrenoid. Asexual reproduction by zoospores and akinetes. Zoospores biflagellate, produced in cells from central part of thallus. Cells round up to form akinetes. Sexual reproduction unknown. Epiphytic on the water fern Azolla where its discoid thallus reaches a few cms in diameter. Reported from England, believed to be present in USA.

Information contributed by: D.M. John. The most recent alteration to this page was made on 2015-02-09 by M.D. Guiry.

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

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 09 February 2015. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 25 September 2023

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