Jaaginema Anagnostidis & Komárek, 1988

Holotype species: Jaaginema subtilissimum (Kützing ex Forti) Anagnostidis & Komárek

Original publication and holotype designation: Anagnostidis, K. & Komárek, J. (1988). Modern approach to the classification system of cyanophytes. 3. Oscillatoriales. Archiv für Hydrobiologie, Supplement 80(1-4): 327-472, 35 figs, 13 tables.

Description: Filamentous; filaments usually solitary or freely clustered (tangled and coiled) into small colonies, rarely forming macroscopically visible mats; trichomes always without sheaths, cylindrical~ isopolar, usually waved or coiled, narrow, thin, 0.53 _m wide, uniseriate, usually not narrowed to the ends, slightly constricted or unconstricted at the crosswalls, always nonmotile. Cells cylindrical, elongated, longer than wide (to several times), without aerotopes, sometimes with solitary granules (rarely at the crosswalls); end cells rounded or narrowed, pointed or conical-rounded, always without calyptra. Cell content pale blue-green, grey, yellowish or olive-green; in some species ability of chromatic adaptation (changeable phycobilin ratio). Cell division by the crosswise binary fission, perpendicular to the long axis of a trichome, daughter cells grow Å up to the original size before the next division. All cells capable of division. Reproduction by the fragmentation of trichomes without necridic cells into nonmotile hormocytes (indistinct motility was not proved yet). Mainly benthic organisms, growing on the bottom of diverse water biotopes, pools, lakes, reservoirs with rich vegetation of water plants, common in metaphyton. Several species known from mineral, thermal or saline waters.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2022-05-04 by G.M. Guiry.

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

Most recent taxonomic treatment adopted: Mai, T., Johansen, J.R., Pietrasiak, N., Bohunická, M. & Martin, M.P. (2018). Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species. Phytotaxa 365(1): 1-59, 23 figures, 14 tables.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43603

Citing AlgaeBase
Cite this record as:
G.M. Guiry in Guiry, M.D. & Guiry, G.M. 04 May 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024