Rhexinema Geitler, 1943

Holotype species: Rhexinema paucicellulare (Vischer) Geitler

Original publication and holotype designation: Geitler, L. (1943). Zur Kenntnis der Bewohner des Oberflächenhaütchens einheimischer Gewässe. Biologia Generalis 16: 450-475.

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Description: Abundantly branched filaments, often disintegrating into shorter pieces or individual cells. Cells are surrounded with gelatinous sheath, not visible without staining with methylene blue or Indian ink. Cells cylindrical, pyriform, to spherical, depending on age. Especially in young colonies, the cells are markedly L-shaped. The side branches originate from the upper part of the cell near the transverse wall, and arise by lateral bulges. Older thalli form palmelloid stages, composed by small groups of spherical cells surrounded by a wide, irregularly shaped mucilaginous envelope. Cells uninucleate, containing a parietal chloroplast with one distinct pyrenoid. Asexual reproduction by bi- or quadriflagellate zoospores and colony dissociation into single cells which become akinetes.

Information contributed by: Skaloud et al. (2018: 122).. The most recent alteration to this page was made on 2018-03-15 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 neuter.

Most recent taxonomic treatment adopted: Darienko, T. & Pröschold, T. (2017). Toward a monograph of non-marine Ulvophyceae using an integrative approach (Molecular phylogeny and systematics of terrestrial Ulvophyceae II.). Phytotaxa 324(1): 1-41, 23 figs.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47258

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 15 March 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024