Cylindrospermopsis G.Seenayya & N.Subba Raju, 1972

Holotype species: Cylindrospermopsis raciborskii (Wołoszyńska) Seenayya & Subba Raju

Original publication and holotype designation: Seenayya, G. & Subba Raju, N. (1972). On the ecology and systematic of the alga known as Anabaenopsis raciborskii (Wolosz.) Elenk. and a critical evaluation of the forms described under the genus Anabaenopsis. In: Papers submitted to the First International Symposium on Taxonomy and Biology of blue-green algae. (Desikachary, T.V. Eds), pp. 52-57. Madras:

Description: Filaments solitary, straight or screw-like coiled, free-floating, slightly narrowed to the both ends, without sheaths; trichomes isopolar (or secondary heteropolar transient stages), with slight constrictions or unconstricted at crosswalls, subsymmetric (according to the position of heterocytes and akinetes). Cells cylindrical, isodiametric or shorter or longer than wide, pale blue-green or yellowish, with aerotopes; end cells (before heterocyte formation) narrowed, conical, bluntly pointed. Heterocytes ovoid or conical, sometimes slightly curved, unipored, terminal; they develop from the terminal cells, which change into proheterocytes after asymmetrical cross division of the end cell in a young trichome. Akinetes oval to cylindrical with rounded ends, developing asymmetrically on a trichome, solitary or in short rows (up to three), slightly distant from the terminal heterocytes, rarely close to heterocytes. Cells divide crosswise (sometimes asymmetrically) and grow more or less into the original size before the next division. Without meristematic zones, all cells capable of dividing. Reproduction by trichome fragmentation and akinetes. All species planktonic in eutrophic aquatic basins (water blooms), commonly in tropical countries; more common A. raciborskii facultatively also in temperate zones during summer.

Information kindly contributed by J. Komárek but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Raphidiopsis.

Most recent taxonomic treatment adopted: Aguilera, A., Berrendero Gómez, E., Kaštovský, J., Echenique, R.O. & Salerno, G.L. (2018). The polyphasic analysis of two native Raphidiopsis isolates supports the unification of the genera Raphidiopsis and Cylindrospermopsis (Nostocales, Cyanobacteria). Phycologia 57(2): 130-146.

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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=43594

Citing AlgaeBase
Cite this record as:
Wendy Guiry in Guiry, M.D. & Guiry, G.M. 03 April 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024