Oocystella Lemmermann, 1903
Holotype species: Oocystella natans Lemmermann
Publication details: Lemmermann, 1903: 103
Currently accepted name for the type species: Oocystis natans (Lemmermann) Lemmermann
Original publication and holotype designation: Lemmermann, E. (1903). Brandenburgische Algen II. Das Phytoplankton des Müggelsees und einiger benachbarter Gewässer. Zeitschrift für Fischerei und deren Hilfswissenschaften 11(2): 73-123, 5 figures.
Request PDFDescription: Cells solitary or in 2-4-8-16-celled colonies within thin, hyaline, sometimes concentrically stratified mucilaginous envelope or within an expanded mother cell wall. Colony oval, ellipsoid or spherical, up to 55 &m in diameter. Cells broadly fusiform, ellipsoid, oval to nearly spherical, 4-32 x 2.5-22 &m. Cell wall smooth, often with polar thickenings. Chloroplast 1-4 (infrequently more), parietal, stellate or H-shaped, more frequently bowl-shaped or discoid, with a pyrenoid. Asexual reproduction by 2-4-8-(16) autospores released by rupture of the mother cell wall; compound colonies resulting from persistent mother cell walls of parental generation of frequent occurrence. Hindák (1988) reported oogamy in one species, O. oogama. Oocystella planktonic, predominantly freshwater; cosmopolitan.
Information kindly contributed by G. Dillard but may now be outdated.
Taxonomic status: This name is currently regarded as a synonym of Oocystis.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: John, D.M. & Tsarenko, P.M. (2002). Order Chlorococcales. In: The Freshwater Algal Flora of the British Isles. An identification guide to freshwater and terrestrial algae. (John, D.M., Whitton, B.A. & Brook, A.J. Eds), pp. 327-409. Cambridge: Cambridge University Press.
Comments: cf. remarks under Oocystis)
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=44332
Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 17 May 2025. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 June 2025
