Korshikoviella P.C.Silva, 1959

Holotype species: Korshikoviella gracilipes (F.D.Lambert) P.C.Silva

Currently accepted name for the type species: Korshikoviella michailovskoensis (Elenkin) P.C.Silva

Original publication and holotype designation: Silva, P.C. (1959). Remarks on algal nomenclature. II. Taxon 8: 60-64.

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Description: Solitary cells attached by cell wall process, sometimes occurring in clusters on host animals. Cells straight or curved, one species (K. schaefernae) with broadly to slightly pointed upper end, most species narrowing to needle like appendage at upper end, opposite pole also attenuate with straight to dichotomous attachment organ. Cells elongate, 25-480 x 3-23 µm with smooth cell walls. Cells uninucleate; chloroplast parietal, band shaped and single, with single pyrenoid; however, during sporogenesis multiple chloroplasts and pyrenoids present. Asexual reproduction by biflagellate zoospores; up to 64 per sporangium, released by tear in lateral wall. Zoospores with anterior contractile vacuoles, and parietal, band shaped chloroplast with pyrenoid and stigma. During sporogenesis in at least one species (K. michailovskoensis) pyrenoid division precedes chloroplast and nuclear division. Initial divisions of sporangium always transverse. After settlement, spores may develop single spine before assuming typical morphology. Sexual reproduction described for K. gracilipes. Gametes non-flagellated, spermatia oval, to 5 µm long, with numerous gametes liberated from single differentiated cell. Female gametangium divides transversely to form two gametes. Spermatia attach to female gametangial wall. After syngamy and zygote maturation, smooth walled zygotes release through lateral wall. Site of meiosis unknown but presumably on germination of zygote. Korshikoviella spp. mostly epizoic on planktonic animals in freshwater, sometimes secondarily planktonic; reported from Europe, North America, Asia and Africa, although several species restricted to Europe. Genus included in Characium by some authors. Species distinguished based on differences in cell size and shape.

Information contributed by: D. Gargary & T. Kalina. The most recent alteration to this page was made on 2012-07-02 by Michael Guiry.

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

Most recent taxonomic treatment adopted: Tsarenko, P.M. (2011). Sphaeropleales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 280-355. 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=43384

Citing AlgaeBase
Cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 02 July 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 November 2024