Oocystis Nägeli ex A.Braun, 1855: 94
Holotype species: Oocystis naegelii A.Braun
Original publication and holotype designation:Braun, A. (1855). Algarum unicellularium genera nova et minus cognita praemissis observationibus de algis unicellularibus in genere. pp. [1]-114, 6 pls. Lipsiae [Leipzig]: apud W. Engelmann.
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Taxonomic status: currently recognized as a distinct genus.
Description: Cells solitary or in 2-4-8-(?16)-celled colonies within a thin, hyaline mucilaginous envelope or within an expanded mother cell wall. Colony oval to ellipsoid, up to 77 &m in diameter. Cells fusiform, ellipsoid, oval to nearly spherical, 7-46 x 12-50 &m. Cell wall smooth, sometimes with polar thickenings. Chloroplast one to many, parietal, bowl-shaped or discoid, without a pyrenoid. Asexual reproduction by 2-4-8-(16) autospores released by rupture of the mother cell wall. Sexual reproduction and flagellated stages unknown. Oocystis planktonic, predominantly freshwater; cosmopolitan. Komárek & Fott (1983) list 28 species with an additional 16 species designated as incompletely described or difficult to identify. Hindák (1988), based upon Skuja's (1964) examination of the type material the cells of which lack pyrenoids, assigns to the genus Oocystis only those forms without a pyrenoid and lists 8 species for the genus; he assigns 17 species possessing a pyrenoid, four new species and thirteen species included in the genus Oocystis by Komárek & Fott (1983) to Oocystella Lemmermann.
NCBI Nucleotide Sequences
Numbers of names and species: There are 104 species (and infraspecific) names in the database at present, of which 39 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Oocystis alpina Reisigl C
Oocystis apiculata var. obesa Playfair C
Oocystis apiculata var. splendida Playfair C
Oocystis apiculata var. simplicior Playfair C
Oocystis apiculata var. major Playfair C
Oocystis apiculata West C
Oocystis apiculata var. asymmetrica Playfair C
Oocystis asterifera Skuja S
Oocystis asymmetrica West & G.S.West C
Oocystis australiensis Playfair C
Oocystis borgei J.W.Snow C
Oocystis borgei var. hyppanica P.P.Schirschoff C
Oocystis brevispina H.Silva C
Oocystis chodati Playfair C
Oocystis ciliata Lagerheim S
Oocystis ciliata var. radians West & G.S.West S
Oocystis ciliata var. amphitrica Lagerheim S
Oocystis composita A.I.Proschkina-Lavrenko C
Oocystis coronata Lemmermann S
Oocystis crassa var. ostenfeldii Playfair C
Oocystis crassa var. granulosa Playfair C
Oocystis crassa var. elongata Playfair C
Oocystis crassa var. minor Nygaard C
Oocystis crassa var. marssonii (Lemmermann) Printz S
Oocystis crassa Wittrock S
Oocystis decorata Svirenko S
Oocystis ecballocystiformis Iyengar C
Oocystis echidna Bohlin S
Oocystis elliptica West C
Oocystis elliptica var. minor West S
Oocystis eremosphaeria G.M.Smith S
Oocystis geminata Nägeli ex A.Braun C
Oocystis gigas W.Archer S
Oocystis gigas var. minor West & G.S.West S
Oocystis gigas var. incrassata W.et G.S.West C
Oocystis granulata T.Hortobágyi C
Oocystis heteromucosa Hegewald S
Oocystis hunanensis f. calida B.Tracanna C
Oocystis hunanensis C.C.Jao C
Oocystis irregularis (Petkoff) Printz C
Oocystis lacustris Chodat C
Oocystis lacustris var. paludensis Playfair C
Oocystis lacustris var. natans (Lemmermann) Playfair P
Oocystis mammillata W.B.Turner C
Oocystis marssonii Lemmermann C
Oocystis minuta var. vacuolata S.Watanabe C
Oocystis minuta Guillard, H.C.Bold & MacEntee C
Oocystis minuta var. ellipsoidea Broady C
Oocystis naegelii var. incrassata Lemmermann C
Oocystis naegelii f. irregularis Petkoff S
Oocystis naegelii A.Braun C - type
Oocystis naegelii var. obesa Playfair C
Oocystis naegelii var. curta Playfair C
Oocystis natans (Lemmermann) Lemmermann C
Oocystis nephrocytioides Fott & Cado S
Oocystis nodulosa West C
Oocystis nodulosa var. australis Playfair C
Oocystis nodulosa var. crassa Playfair C
Oocystis nordstedtiana var. rotunda (Schmidle) Playfair P
Oocystis nordstedtiana (De Toni) Playfair P
Oocystis novae-semliae Wille C
Oocystis novae-semliae f. major Wille C
Oocystis novae-semliae var. maxima West & G.S.West C
Oocystis novae-semliae var. tuberculata Schmidle C
Oocystis novaesemliae var. australica Playfair C
Oocystis ornata Fott S
Oocystis ovalis (W.B.Turner) West & G.S.West P
Oocystis ovalis var. subtruncata Playfair C
Oocystis ovalis var. cylindracea Playfair C
Oocystis panduriformis var. major West & G.S.West S
Oocystis panduriformis West & G.S.West C
Oocystis panduriformis var. minor G.M.Smith C
Oocystis panduriformis var. pachyderma West & G.S.West C
Oocystis parva West & G.S.West C
Oocystis pelagica Lemmermann C
Oocystis planctonica Chodat P
Oocystis polychaeta P.P.Schirschoff S
Oocystis polymorpha P
Oocystis pseudocoronata Korshikov S
Oocystis pusilla var. major Skuja C
Oocystis pusilla Hansgirg C
Oocystis rhomboidea Fott C
Oocystis rifeum P.González C
Oocystis rotula Playfair C
Oocystis rupestris f. acuminata F.E.Fritsch & M.F.Rich C
Oocystis rupestris Kirchner C
Oocystis socialis Ostenfeldt C
Oocystis solitaria f. major Wille S
Oocystis solitaria var. notabile West & G.S.West S
Oocystis solitaria f. major Wille S
Oocystis solitaria var. terrestris J.Phillipson C
Oocystis solitaria var. apiculata Printz C
Oocystis solitaria var. elongata P
Oocystis solitaria var. major (Wille) P.M.Tsarenko C
Oocystis solitaria Wittrock C
Oocystis sphaerica W.B.Turner C
Oocystis sphaerica Meunier C
Oocystis striata P.González C
Oocystis subhexagona Playfair C
Oocystis submarina var. major G.S.West C
Oocystis submarina Lagerheim C
Oocystis submarina var. variabilis Skuja C
Oocystis subsphaerica Playfair C
Oocystis verrucosa J.V.Roll S
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: http://www.algaebase.org/search/genus/detail/?genus_id=43441
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 June 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:6950
