Tetrachlorella Korshikov, 1939

Holotype species: Tetrachlorella alternans (G.M.Smith) Korshikov

Original publication and holotype designation: Korshikov, A.A. (1939). Contribution to the algal flora of the Gorky District Phytoplankton of the Oka River in August 1932. Zapiski Gorkovskogo Universiteta 9: 101-128.

Description: Thalli colonial, forming 2- or mostly 4-celled coenobia, to 32 µm diameter; up to 16-celled compound coenobia formed during reproduction. Cells arranged mostly in one plane in wide, structureless, mucilage envelope that is occasionally absent. Cells oval, 4.5-20 x 2-10 µm, arranged with inner pair of cells parallel but only partly overlapping along lateral walls, and outer pair also parallel and attached to portions of inner pair cell walls. Cell walls smooth (2 species) or with wall granulations (2 species, the latter either forming a ring at one end of each cell or with several linear aggregations of granulations at one or both ends of cells. Cells uninucleate; chloroplast single and parietal with single pyrenoid. Asexual reproduction by autospores; commonly 4 but occasionally 2 per sporangium and organized into coenobia; coenobia released by rupture of parental cell walls that rapidly dissolve. Sexual reproduction and flagellated stages absent. Tetrachlorella planktonic in variety of freshwater systems including lakes, rivers and reservoirs; occasionally abundant in eutrophic water; reported from Europe and North America. Genus distinguished based on characteristic coenobial structure and form of compound colonies. Morphologically, considered most similar to Crucigeniella. Species differences include cell size and patterns of wall ornamentation (when present).

Information contributed by: D. Garbary. The most recent alteration to this page was made on 2011-12-21 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Tsarenko, P.M. (2011). Trebouxiophyceae. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 61-108. Ruggell: A.R.A. Gantner Verlag K.-G..

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44280

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 December 2011. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 November 2024