Diaphragma Geitler, 1942

Holotype species: Diaphragma radiosum Geitler

Original publication and holotype designation: Geitler, L. (1942). Morphologie, Entwicklungsgeschichte und Systematik neuer bemerkenswerter atmophytischer Algen aus Wien. Flora 136: 1-29.

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Description: Plants prostrate, consisting of irregularly branched, uniseriate filaments of cylindrical cells, after division the cells separate but still remain within the filament. Cells with parietal chloroplast, band or plate-like; pyrenoids absent but starch present. Asexual reproduction by biflagellate zoospores, 4-8 produced per cell. Zoospores with stigma and two contractile vacuoles. Sexual reproduction unknown. Diaphragma rarely reported; grows on soil among moss and in mucilage of blue-green algae. Reported from Europe and New Zealand. Plants prostrate, consisting of irregularly branched, uniseriate filaments of cylindrical cells, after division the cells separate but still remain within the filament. Cells with parietal chloroplast, band or plate-like; pyrenoids absent but starch present. Asexual reproduction by biflagellate zoospores, 4-8 produced per cell. Zoospores with stigma and two contractile vacuoles. Sexual reproduction unknown. Diaphragma rarely reported; grows on soil among moss and in mucilage of blue-green algae. Reported from Europe and New Zealand.

Information contributed by: D.M. John. The most recent alteration to this page was made on 2012-07-16 by Michael Guiry.

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

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=46584

Citing AlgaeBase
Cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 16 July 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024