Cyanostylon Geitler, 1928

Holotype species: Cyanostylon microcystoides Geitler

Original publication and holotype designation: Geitler, L. (1928). Copulation und Geschlechtsverteilung bei einer Nitzschia-Art. Archiv für Protistenkunde 61: 419-442.

Description: Unicellular-colonial; colonies gelatinous, microscopic, composed of thick, mucilaginous, colorless, more or less radially oriented and irregularly curved stalks, usually crosswise lamellated (result of one-sided production of slime from cells), at the bases confluent; stalks sometimes pseudodichotomously branched; colonies loosely joined to the substrate or free-living in metaphyton or in plankton (one species). Cells disposed at the ends of stalks, enveloped by their own diffluent envelopes, solitary, in pairs or in irregular groups, spherical or hemispherical, rarely of irregular shape; cell content pale blue-green, olive-green or bright blue-green, usually slightly granular. Cell division firstly in 2 directions by binary fission which increases the Chroococcus-like group of cells, later also dividing irregularly in more planes. Reproduction by the dissociation of colonies. The type species is described from the littoral of clear alpine lakes in central Europe, 2 species are known from similar biotopes in China, one from Scandinavia, one was described from plankton of Lake Volvi, Greece.

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 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.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44902

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 29 March 2024

 
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