Fischerella (Bornet & Flahault) Gomont, 1895
Holotype species: Fischerella thermalis Gomont
Original publication and holotype designation: Gomont, M.[A]. (1895). Note sur le Scytonema ambiguum Kützing. Journal de Botanique 9: 49-52, pl. 3 [missing].
Request PDFDescription: Filamentous-thallose; thallus usually felt-like, rarely in compact mats, composed of creeping, uni- or multiserial filaments and morphologically different, more or less erect uniseriate branches. Creeping trichomes usually moniliform, enveloped by thick, waved, sometimes slightly lamellated and colored sheath, with usually barreliform cells, sometimes enveloped by their own gelatinous sheaths; erect true branches develop usually unilaterally after the lengthwise cell division in basal trichomes (T-type branching), usually cylindrical, with cylindrical and often elongated cells and thin, mainly colorless sheaths. Cells usually with slightly granular contents, thylakoids distributed irregularly throughout. Heterocytes intercalary, subspherical in basal trichomes, cylindrical in branches. Akinetes develop occasionally and irregularly in basal trichomes (in a few species). Reproduction by uniseriate hormogonia, which separate from ends of branches; they are usually morphologically very distinct (different from other cells in branches) and contain aerotopes (liberation usually during humid vegetation periods). Most species are subaerophytic, growing on wet (often acidic, peaty) soils, several species occur only in tropical forests (on bark of trees, mosses, etc.).
Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-06 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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=43621
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
