Koliella Hindák, 1963

Holotype species: Koliella spiculiformis (Vischer) Hindák

Original publication and holotype designation: Hindák, F. (1963). Systematik der Gattungen Koliella gen. nov. und Raphidonema Lagerh. Nova Hedwigia 6: 95-125.

Description: Cells normally solitary, fusiform, filiform or (strongly) elongate, straight or curved, with obtuse or rotund apices or gradually tapering into (very) long bristle-like points. After division, cells normally immediately detaching, sometimes remaining united in short, weakly filamentous configuration whereby each cell (gradually) attains specific enlarged shape, also occurring when cells possess strongly pointed poles. Cell membrane thin and hyaline, without mucilage. Chloroplast single and parietal, laminate or girdle-shaped, straight or spiral, with or without pyrenoid. Oil droplets in protoplasts. Asexual reproduction by biflagellate zoospores. Multiplication of cells by vegetative cell division. Sexual reproduction supposedly oogamous (?), but adverse conditions would induce formation of thick-walled akinetes. Koliella widely distributed in freshwater; planktonic or periphytic in stagnant water, or epilithic on flooded stones, or cryobiontic in snow and on ice. Based on vegetative cell division and occasional formation of reduced (pseudo)filamentous rows, particularly in cultures, Koliella assigned to Klebsormidiales close to Raphidonema. Cells of Koliella, however, retain basic cell shape (including (strongly) tapering ends) when united in rows, whereas in filaments of Raphidonema, pointed polar cells morphologically different from interadjacent, basically cylindrical cells. Polymorphism in culture suggests Kolliella should be merged with Raphidonema.

Information contributed by: G.M. Lokhorst. The most recent alteration to this page was made on 2011-12-21 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Tsarenko, P.M. (2011). Trebouxiophyceae. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 61-108. Ruggell: A.R.A. Gantner Verlag K.-G..

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43512

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 December 2011. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024