Limnothrix M.-E.Meffert, 1988

Holotype species: Limnothrix redekei (Goor) Meffert

Original publication and holotype designation: Meffert, M.-E. (1988). Limnothrix Meffert nov. gen. - the unsheathed planktic cyanophycean filaments with polar and central gas vacuoles. Algological Studies 50-53: 269-276, 19 figs.

Description: Filamentous; filaments solitary, free floating, straight or slightly curved or irregularly screw-like coiled, many-celled, isopolar, without sheath or with very fine, colourless , facultative sheath (in several species). Trichomes cylindrical, composed from cells which are isodiametric or longer than wide (sometimes several times), unconstricted or slightly constricted at the cross walls, with very thin walls, with missing or very reduced motility, 1-6 um wide, not tapering to the ends, usually with cylindrical (but sometimes with conical) apical cells, without terminal calyptra (but rarely with conical plasmatic protrusions). Cells pale blue-green, yellowish or pinkish, able to produce facultative gas vesicles; aerotopes are localized at the ends of cells, or united into long, large, central aerotope; thylakoids sometimes slightly waved, localized parallely along the cell walls. Phycobiline composition changeable (with unstable phycoerythrin/phycocyanin ratio). Known involution cells. No toxic strains. Heterocytes and akinetes absent.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2021-08-21 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: Komárek, J., Kaštovský, J., Mares, J. & Johansen, J.R. (2014). Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014, using a polyphasic approach. Preslia 86: 295-335.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 August 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 23 May 2024

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