Snowella Elenkin, 1938
Holotype species: Snowella rosea (J.W.Snow) Elenkin
Original publication and holotype designation: Elenkin, A.A. (1938). Sinezeleniye vodorosli SSSR. Monografiya presnovodnykh i nazemnykh S'yanofiseaye, obnaruzhennykh v predelakh SSSR. Spetsial'naya (sistematicheskaya) chast', vyp. I. I. Chroococcaceae Geitl.; II. Chamaesiphoneae Geitl.; III. Hormogoneae (Geitl.) Elenk.: poryadok Stigonematales Geitl.; poryadok Mastigocladales Elenk.; poryadok Diplonematales Elenk.; poryadok Nostocales (Geitl.) Elenk.: sem. Nostocaceae Elenk., sem. Anabaenaceae Elenk., Aphanizomenonaceae Elenk., sem. Nodulariaceae Elenk., sem. Scytonemataceae (Kütz.) Elenk. pp. 984, 290 figures. Moscow & Leningrad: Izdatel'stvo Akademii Nauk SSSR. [in Russian and Latin]
Request PDFDescription: Unicellular-colonial; colonies microscopic, Å spherical or irregularly oval, rarely composed, free living (floating), with indistinct, smooth, colorless, fine and wide mucilaginous envelopes; within the colonies a system of fine, thin (thread-like), Å stable, mucilaginous, Å pseudodichotomously branched and sometimes fasciculating stalks, which are sometimes widened in the center. Cells spherical or slightly radially elongated, joined to the ends of stalks during almost the whole life cycle, distant from one another, sometimes slightly radially shifted to one another (if the cells are densely disposed in old colonies, always remain at least narrow spaces between them); cells pale greyish blue-green, yellowish or pinkish, without or with solitary central aerotopes (granules ?). Cell division in two directions in successive generations, perpendicular to each other and to the surface of a colony; soon after division the cells separate from one another in distant positions. The colonies disintegrate into small cell groups to solitary cells. Freshwater (or in slight brackish biotopes), mainly in plankton of large, slightly eutrophic reservoirs, rarely secondary in metaphyton. Several species are known only from limited areas (one from large North American lakes, 2 from northern regions of north temperate zone, one from alpine lakes); two species possess probably Å worldwide distribution (S. litoralis, S. lacustris).
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=43587
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 23 November 2024
