Microcoleus Desmazières ex Gomont, 1892

Lectotype species: Microcoleus vaginatus 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.].

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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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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 2023-03-03 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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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=43078

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 April 2024

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