Sacconema Borzì ex Bornet & Flahault, 1886
Holotype species: Sacconema rupestre Borzì ex Bornet & Flahault
Original publication and holotype designation: Bornet, É. & Flahault, C. (1886). Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France. Annales des Sciences Naturelles, Botanique, Septième série 3: 323-381.
Request PDFDescription: Filamentous - colonial; filaments heteropolar, irregularly falsely branched, attached by the bases to the substrate or creeping among detritus and other algae, forming shrub-like colonies, composed of heteropolar trichomes and intensely swollen sheaths. Trichomes solitary or in pairs in one sheath, uniseriate, heteropolar, constricted at crosswalls, with basal heterocytes, in the apical part narrowed in elongated, cellular hair; hair-cells cylindrical, hyaline. Sheaths very thick, swollen, widened, to 10-times wider than trichomes, at first closed, later open at the apex, intensely lamellated, at the apex funnel-like divaricated, partly yellowish-brown or brown. Heterocytes basal or intercalary (before the false branching) and secondary at bases of branches, spherical or hemispherical. Akinetes described at trichome bases, more or less spherical, but not well known. Cells divide perpendicularly to the lengthwise trichome axis (meristematic zones ?). Reproduction probably by hormogonia. All insufficiently described species from communities of subaerophytic localities, wet rocky walls and stony littoral of lakes.
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 neuter.
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.
Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=46469
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 26 April 2024
