153,840 species and infraspecific names are in the database, 21,012 images, 59,576 bibliographic items, 413,468 distributional records.

Chaetosphaeridium Klebahn, 1892

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Viridiplantae
Infrakingdom Streptophyta infrakingdom
Phylum Charophyta
Class Coleochaetophyceae
Order Chaetosphaeridiales
Family Chaetosphaeridiaceae

Holotype species: Chaetosphaeridium pringsheimii Klebahn

Original publication and holotype designation: Klebahn, H. (1892). Chaetosphaeridium Pringsheimii, novum genus et nova species chlorophycearum aquae dulcis. Jahrbücher für wissenschaftliche Botanik 24: 268-282.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Marin, B. & Melkonian, M. (1999). Mesostigmatophyceae, a new class of streptophyte green algae revealed by SSU rRNA sequence comparisons. Protist 150: 399-417, 9 figs, 2 tables.

Description: Branched filaments of globose or flask-shaped cells, sometimes appearing as gelatinous colony of unicells. Cells 9-22 um in diameter; in some species connected by long, gelatinous, tubular walls. Each cell bears a single sheathed hair similar to those of Coleochaete; cultured clones have been observed to produce more than 1 hair per cell. One or 2 plate-like, parietal chloroplasts per cell, each with single pyrenoid. Asexual reproduction by biflagellate, scaly zoospores similar to Coleochaete, produced 2-4 per cell. Sexual reproduction observed in one species; oogamous; eggs and sperm discharged; naked eggs and walled zygotes up to twice as large as vegetative cells. Chaetosphaeridium attached to larger algae, aquatic macrophytes and inorganic substrata in freshwater; may occur in plankton; tropical, temperate and arctic/antarctic. Ultrastructure of zoospores similar to Coleochaete and suggests relationship to ancestry of embryophytes.

Information contributed by: L.E. Graham. The most recent alteration to this page was made on 27 Oct 2012 by M.D. Guiry.

Numbers of names and species: There are 7 species names in the database at present, as well as 3 infraspecific names. Of the species names, 7 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
Marin, B. & Melkonian, M. (1999). Mesostigmatophyceae, a new class of streptophyte green algae revealed by SSU rRNA sequence comparisons. Protist 150: 399-417, 9 figs, 2 tables.

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: 20 October 2012 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43508

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 13 December 2018.

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