Rayssiella Edelstein & Prescott, 1964

Holotype species: Rayssiella hemisphaerica Edelstein & Prescott

Original publication and holotype designation: Edelstein, T. & Prescott, G.W. (1964). Rayssiella, a new genus of Oocystaceae (Chlorophyta) from Spring Lake, Michigan. Phycologia 4: 121-125, 9 figs.

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Description: Cells in 4-8-(?16)-celled colonies within mucilaginized, moderately expanded mother cell walls, the cells semicircularly disposed, alternating upward and downward with their bases adherent; most colonies compounded of groups of 4 cells with persistent mother cell walls. Cells ellipsoid, cylindrical, to slightly ovoid, 8-30 x 4-11.5 &m. Chloroplast single, parietal, with one pyrenoid. Asexual reproduction by formation of (4)-8 autospores remaining within the mother cell wall which becomes mucilaginized. Sexual reproduction and flagellated stages unknown. Rayssiella planktonic in freshwater; reported from Alabama and Michigan (USA), Czechoslovakia, Germany, Indonesia, Paraguay and Switzerland.

Information contributed by: G. Dillard. The most recent alteration to this page was made on 2012-07-09 by Michael Guiry.

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

Most recent taxonomic treatment adopted: Bourrelly, P. (1990). Les algues d'eau douce. Initiation à la systématique. Tome I: Les Algues vertes. pp. 1-572. Paris: Société Nouvelle des Éditions Boubée.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47429

Citing AlgaeBase
Cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 09 July 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 20 April 2024