Microcoleus Desmazières ex Gomont, 1892
Lectotype species: Microcoleus vaginatus Gomont ex Gomont
Original publication:Gomont, M. (1892). Monographie des Oscillariées (Nostocacées homocystées). Annales des Sciences Naturelles, Botanique, Série 7 15: 263-368, pls 6-14 [VI-XIV in text and expl. pl.].
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.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Strunecky, O., Komárek, J., Johansen, J., Lukesová, A. & Elster, J. (2013). Molecular and morphological criteria for revision of the genus Microcoleus (Oscillatoriales, cyanobacteria). Journal of Phycology 49(6): 1167-1180, 4 figs.
Description: Filamentous; filaments solitary or joined in fine, thin strata or mats. Filaments composed of a gelatinous, fine, usually colorless and diffluent, homogeneous sheath, in which are densely packed trichomes, arranged parallel and sometimes irregularly screw-like/coiled together; number of trichomes changes usually from 2-3 to more than 100 within one sheath; filaments usually simple, rarely simply branched (only sheaths). Trichomes cylindrical, with straight, usually narrowed ends. Cells usually isodiametric, rarely shorter or longer (to 3 times) than wide; end cells usually conical, rarely with calyptra. (Species with very narrow trichomes and cells always clearly longer than wide and small number of trichomes within sheaths probably belong to a special genus of Schizothrichaceae). Cell division crosswise, daughter cells grow into the original size before the next division. Reproduction by motile fragments of trichomes or hormogonia; fragmentation usually by help of necridic cells. Mainly benthic and soil species, covering the substrate or growing in psammon under a slight layer of wet sand. Several species known from sandy and muddy marine beaches and river estuaries or from other types of sea coasts or inland saline biotopes. Several species are known from wet soil or from littoral of clear or slightly polluted water bodies, where they cover mud or acquatic plants. Known also from wet rocks and mineral springs.
Information contributed by: J. Komárek. The most recent alteration to this page was made on 30 Mar 2017 by M.D. Guiry.
Numbers of names and species: There are 111 species names in the database at present, as well as 18 infraspecific names. Of the species names, 54 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.
Boyer, S.L., Johansen, J.R., Flechtner, V.R. & Howard, G.L. (2002). Phylogeny and genetic variance in terrestrial Microcoleus (Cyanophyceae) species based on sequence analysis of the 16s rRNA gene and associated 16S-23S ITS region. Journal of Phycology 38: 1222-1235.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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: 30 March 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43078
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 11 November 2019.