157,596 species and infraspecific names are in the database, 22,210 images, 61,015 bibliographic items, 459,891 distributional records.

Schizomeris Kützing, 1843

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Viridiplantae
Infrakingdom Chlorophyta infrakingdom
Phylum Chlorophyta
Subphylum Chlorophytina
Class Chlorophyceae
Order Chaetophorales
Family Schizomeridaceae

Holotype species: Schizomeris leibleinii Kützing

Original publication and holotype designation: Kützing, F.T. (1843). Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Silva, P.C. (1996-to date). Index Nominum Algarum, University Herbarium, University of California, Berkeley http://ucjeps.berkeley.edu/INA.html. Updated continuously. ..

Description: Plants unbranched and filamentous, uniseriate in basal portion and multiseriate above. Cells long and cylindrical near base, quadrate above where filament multiseriate. Cells uninucleate with single parietal chloroplast filling two thirds of cell and cells towards base contain several pyrenoids. Asexual reproduction by aplanospores and normally quadriflagellate zoospores formed in multiseriate portions. Single report of zoospores with 2-8, or more, flagella. Sexual reproduction unknown. Schizomeris found standing bodies of water; rarely reported. There has been no general acceptance of view that this genus is simply a growth form of Stigeoclonium. The taxonomic position of the genus has been the subject of much debate with opinions differing as to its correct placement. On ultrastructural grounds its affinities are with the Chaetophorales based on presence of phycoplast microtubules at cytokinesis and presence of plasmodesmata. Ultrastructure of flagellated stage has also been investigated.

Information contributed by: D.M. John. The most recent alteration to this page was made on 11 Jul 2012 by Michael Guiry.

Numbers of names and species: There are 4 species names in the database at present, of which 3 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

References
Caisová, L., Marin, B., Sausen, N., Proschold, T. & Melkonian, M. (2011). Polyphyly of Chaetophora and Stigeoclonium within the Chaetophorales (Chlorophyceae), revealed by sequence comparisons of nuclear-encoded SSU rRNA genes. Journal of Phycology 47(1): 164-177.

John, D.M. (2002). Orders Chaetophorales, Klebshormidiales, Microsporales, Ulotrichales. In: The Freshwater Algal Flora of the British Isles. An identification guide to freshwater and terrestrial algae. (John, D.M., Whitton, B.A. & Brook, A.J. Eds), pp. 433-468. Cambridge: Cambridge University Press.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 11 April 2002 by M.D. Guiry

Verified by: 11 July 2012 by Michael Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43478

Citing AlgaeBase
Please cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 29 February 2020.

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