153,581 species and infraspecific names are in the database, 20,980 images, 59,369 bibliographic items, 411,009 distributional records.

Oscillatoria Vaucher ex Gomont, 1892

Classification:
Empire Prokaryota
Kingdom Eubacteria
Subkingdom Negibacteria
Phylum Cyanobacteria
Class Cyanophyceae
Subclass Oscillatoriophycidae
Order Oscillatoriales
Family Oscillatoriaceae

Lectotype species: Oscillatoria princeps Vaucher ex Gomont

Original publication:Gomont, M. (1892 '1893'). Monographie des Oscillariées (Nostocacées Homocystées). Deuxième partie. - Lyngbyées. Annales des Sciences Naturelles, Botanique, Série 7 16: 91-264, pls 1-7.
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Type designated in Gardner, N.L. (1932). The Myxophyceae of Porto Rico and the Virgin Islands. In: Scientific Survey of Porto Rico and the Virgin Islands. Volume VIII. Part 2. (Anon. Eds), pp. 249-311. New York: New York Academy of Sciences.
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Precise date of publication1 Jan 1892

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Komárek, J., Kastovsky, J., Mares, J. & Johansen, J.R. (2014). Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014, using a polyphasic approach. Preslia 86: 295-335.

Description: Very common genus consisting of unbranched filaments (trichomes) in plankton or attached, often in fine, smooth layered strata (mats), microscopic to macroscopic to several cm diam.; rarely solitary or in small groups, without sheaths except under extreme or some culture conditions when thin, colorless, firm sheaths opened at the apex may develop. Trichomes isopolar, straight to slightly curved, usually >8 to 60 _m wide, uniseriate, of short cylindrical or discoid cells (always shorter than wide), constricted or unconstricted at crosswalls, Å attenuated at the ends, often motile by oscillating/gliding. Cells without aerotopes but with fine granulation or with solitary granules, blue-green, brownish or pinkish, thylakoids coiled usually irregularly throughout the cell. End cells widely rounded, sometimes capitate or with narrow calyptra. False branching, heterocytes and akinetes lacking. Cell division crosswise, in rapid sequence and sometimes in irregular meristematic zones. Trichomes fragment into shorter, motile hormogonia by means of separation or by necridic cells. Species form mats on different substrates (mud, stones, sand, etc.), in shallow water biotopes, in littoral or benthic fresh, brackish or marine habitats and on wet soils. Some assume a planktonic role, macroscopic mats floating or smaller groups of trichomes with cells developing gas vesicles. This common bluegreen genus is distributed worldwide, but several species are geographically more confined. Physiologically some Oscillatoria spp. have been implicated in N2 fixation, especially under microaerophilic or anoxic conditions. Anoxic photosynthesis using H2S as proton donor has been implied. Other areas of research have included recombination, genome size range of 2.50-4.38 x 109 daltons (Herdman et al 1979a, b), and early Precambrian fossil stromatolites.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 3 Mar 2015 by M.D. Guiry.

Numbers of names and species: There are 632 species names in the database at present, as well as 344 infraspecific names. Of the species names, 307 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is 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):

Click here to also show infraspecific names in the list below.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 28 December 2000 by M.D. Guiry

Verified by: 03 March 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43083

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 14 November 2018.

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