161,733 species and infraspecific names are in the database, 22,723 images, 63,700 bibliographic items, 473,646 distributional records.

Isoselmis Butcher, 1967

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Cryptophyta
Class Cryptophyceae
Order Cryptomonadales
Family Cryptomonadaceae

Holotype species: Isoselmis obconica Butcher

Original publication and holotype designation: Butcher, R.W. (1967). An introductory account of the smaller algae of British coastal waters. Part IV: Cryptophyceae. Fisheries Investigations, London, series IV 1967: [i]-vi, [1]-54, 22 pls.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Throndsen, J. (1996). The planktonic marine flagellates. In: Identifying marine phytoplankton. (Tomas, C.R. Eds), pp. 591-730. San Diego: Academic Press.

Description: Free-swimming, biflagellate monads; obovoid and somewhat metabolic; without furrow and gullet, but with two short, superficial rows of ejectisomes in the anterior-ventral region; the flagella equal and homodynamic, arising from a subapical depression; a single chloroplast, bright red to yellow, parietal, boat-shaped, filling about two-thirds the periphery of the cell; a pyrenoid and stigma present or not; forming palmelloid colonies in culture. Known only from a single sample taken off the Plymouth coast, England, and only with hesitation distinguished from the similar genus, Plagioselmis Butcher.

Information contributed by: D. R. A. Hill. The most recent alteration to this page was made on 19 Sep 2014 by M.D. Guiry.

Numbers of names and species: There is only one species or infraspecific name in the database at present, which has 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
Chrétiennot-Dinet, M.-J. (1990). Atlas du phytoplancton marin. Volume III: Chlorarachnophycées, Chlorophycées, Chrysophycées, Cryptophycées, Euglénophycées, Eustigmatophycées, Prasinophycées, Prymnesiophycées, Rhodophycées et Tribophycées Avec la collaboration de Chantal Billard et Alain Sournia. pp. [1]-261. Paris: Éditions du Centre National de la Recherche Scientifique 15, quai Anatole France - 75700 Paris.

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: 16 September 2004 by Robert Wilkes

Verified by: 19 September 2014 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=47340

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 June 2021.

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