155,266 species and infraspecific names are in the database, 21,864 images, 60,052 bibliographic items, 435,064 distributional records.

Chaetonema Nowakowski [Nowakovsky], 1876

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

Holotype species: Chaetonema irregulare Nowakowski

Original publication and holotype designation: Nowakowski, L. (1876). Beitrag zur Kenntniss der Chytridiaceen. Beiträge zur Biologie der Pflanzen 2(1): 73-96.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Burova, O.V., Tsarenko, P.M., Kovalenko, O.V., Petlovany, O.A., Mikhailyuk, T.I. & Lilitska, G.G. (2011). Chaetophorales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 264-278. Ruggell: A.R.A. Gantner Verlag K.-G.

Description: Plants on and within mucilage envelope of other algae, consisting of irregularly branched, uniseriate filaments, some laterals perpendicular to main axis and others prolonged to form a terminal hair. Hairs often arise on short prolongation of cell. Cells uninucleate, cylindrical and elongated, each with parietal chloroplast encircling more than half of cell lumen and 1 or 2 pyrenoids. Asexual reproduction by quadriflagellate zoospores; flagella of equal length. Sexual reproduction oogamous, with 8 biflagellate male gametes in each swollen gametangium and female gamete formed by swelling of a cell. Chaetonema on or within mucilage of various freshwater algae including Batrachospermum, Chaetophora and Tetraspora. Reported from Europe and North America. It has been suggested that Chaetonema ornatum should be transferred to the doubtful genus Chaetonemopsis. Plants on and within mucilage envelope of other algae, consisting of irregularly branched, uniseriate filaments, some laterals perpendicular to main axis and others prolonged to form a terminal hair. Hairs often arise on short prolongation of cell. Cells uninucleate, cylindrical and elongated, each with parietal chloroplast encircling more than half of cell lumen and 1 or 2 pyrenoids. Asexual reproduction by quadriflagellate zoospores; flagella of equal length. Sexual reproduction oogamous, with 8 biflagellate male gametes in each swollen gametangium and female gamete formed by swelling of a cell. Chaetonema on or within mucilage of various freshwater algae including Batrachospermum, Chaetophora and Tetraspora. Reported from Europe and North America. It has been suggested that Chaetonema ornatum should be transferred to the doubtful genus Chaetonemopsis.

Information contributed by: D.M. John. The most recent alteration to this page was made on 16 Jul 2012 by Michael Guiry.

Numbers of names and species: There are 3 species names in the database at present, as well as 1 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.

References
Cambra Sánchez, J., Álvarez Cobelas, M. & Aboal Sanjurjo, M. (1998). Lista florística y bibliográfica de los clorófitos (Chlorophyta) de la Península Ibérica, Islas Baleares e Islas Canarias. pp. 1-614. Burgos: Asociación Española de Limnología.

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: 16 July 2012 by Michael Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43356

Citing AlgaeBase
Please cite this record as:
Michael Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 24 May 2019.

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