152,930 species and infraspecific names are in the database, 20,947 images, 59,150 bibliographic items, 408,271 distributional records.

Cystoclonium Kützing, 1843

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Gigartinales
Family Cystocloniaceae

Holotype species: Cystoclonium purpurascens (Hudson) Kützing

Currently accepted name for the type species: Cystoclonium purpureum (Hudson) Batters

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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Precise date of publication14-16 September 1843

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Description: Plants reach 60 cm in length, are erect from a digitate holdfast, and are terete, irregularly branched, and obviously uniaxial only in cross sections of young axes. Older axes are mixtures of rounded axial derivatives and narrow rhizoids, surrounded by a compact, pseudoparenchymatous cortex.

Gametophytes are dioecious, the carpogonial branches 3-celled, the auxiliary cells differentiated before diploidization. Carposporophytes develop thallus-inwardly and consist of a large irregular fusion cell surrounded almost directly by layers of carposporangia. Spermatangia form in superficial sori. Tetrasporangia are scattered in the cortices of younger branchlets (Dixon and Irvine, 1977).

Information contributed by: G.T. Kraft and M.D. Guiry. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.

Comments: Distribution: The type species and only species occurs in Arctic and north Atlantic waters from New Jersey in the west through Greenland to Atlantic France in the east.

Numbers of names and species: There are 13 species names in the database at present, as well as 5 infraspecific names. Of the species names, 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.

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: 28 December 2000 by M.D. Guiry

Verified by: 20 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=37409

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 September 2018.

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