Lyngbya C.Agardh ex Gomont, 1892, nom. et typ. cons.
Holotype species: Lyngbya confervoides C.Agardh ex Gomont
Original publication and holotype designation: 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.
Request PDFDescription: Filamentous; filaments thick, rarely solitary, usually connected into thick, layered, sometimes leathery strata (mats), rarely tangled into free clusters of coiled filaments, usually macroscopic, to several cm or dm diam., with firm sheaths, which are sometimes layered or stratified and brownish colored, opened at the ends; very rarely without sheaths (usually only reproducing hormogonia); unbranched or slightly falsely branched with short and sporadical branches. Trichomes isopolar, straight or slightly waved, thick (5.5-60 _m), uniseriate, composed of shortly cylindrical or barrel-shaped discoid cells, unconstricted or constricted at the crosswalls, not attenuated or attenuated to the ends, nonmotile or slightly motile (but with motile hormogonia !). Cells very short, always shorter (usually several times) than long, without or (rarely) with facultative aerotopes, usually finely granulated, sometimes more at the crosswalls; cell content blue-green, olive-green, yellowish, brownish or pinkish, with coiled thylakoids, situated more or less over the whole cell content; end cell with thickened outer cell wall or with prominent calyptra. Heterocytes and akinetes absent. Cell division crosswise, perpendicular to the long axis of a trichome, usually in a rapid sequence. Sometimes irregular meristematic zones. Reproduction by Å short, motile hormogonia, which separate from trichomes by help of necridic cells. Disintegration of mats. Usually growing in mats covering different subaerophytic or submersed substrates, several species are marine or brackish. Rarely occur in clusters of tangled filaments in metaphyton of not very polluted water bodies with numerous water plants. Few species occur in plankton as solitary trichomes (rarely L. birgei, etc.). Common all over the world (mainly the halophilic species).
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 feminine.
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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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: https://www.algaebase.org/search/genus/detail/?genus_id=42975
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 22 November 2024
