Pseudochlorothecium Korshikov, 1953

Lectotype species: Pseudochlorothecium mucigenum Korshikov

Original publication and holotype designation: Korshikov, A.A. (1953). Viznachnik prisnovodnihk vodorostey Ukrainsykoi RSR. Pidklas Protokokovi (Protococcineae). Bakuol'ni (Vacuolales) ta Protokokovi (Protococcales) [The Freshwater Algae of the Ukrainian SSR. Sub-Class Protococcineae. Vacuolales and Protococcales]. Vol. 5 pp. 439, 421 figures. Kyiv: Akademyy Nauk Ukrayins'koy RSR. [in Ukrainian]

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Description: Solitary cells attached to substratum by mucilaginous pad or short stipe; basal mucilage often becoming brown. Mature cells 30-40 &m long, oval to egg shaped or broadly cylindrical, slightly pointed to apiculate above or with tapering spine to 7 &m. Cell walls smooth. Cells uninucleate when young, later multinucleate; parietal chloroplasts multiple per cell forming irregular discs, or with reticulate, highly divided chloroplast; without apparent pyrenoids. Asexual reproduction by biflagellate, spherical zoospores and spherical aplanospores; released by dissolution of sporangial apex and forming of elongate sporangial vesicle. Zoospores with two equal flagella and stigma. Aplanospores 6-9 &m when young, later to 24 &m diameter. Sexual reproduction unknown. Pseudochlorothecium attached in freshwater marshes or epiphytic; widely distributed in former USSR (Russia, Siberia, Ukraine), and northern Europe. Single North American report from Woods Hole, Massachusetts. Genus distinguished from Characium by absence of pyrenoid, method of spore release, nuclear number and chloroplast morphology. Genus variously assigned to subfamily Characioideae or to Rhopalosolenaceae in Protosiphonales. Species distinguished based on details of cell wall or spine features.

Information contributed by: D. Garbary and T. Kalina. The most recent alteration to this page was made on 2017-05-02 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). Chlorococcales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 232-264. 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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 02 May 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 November 2024