Chlorotetraëdron F.J.MacEntee, Bold & P.A.Archibald, 1978
Original publication and holotype designation: MacEntee, F.J., Bold, H.C. & Archibald, P.A. (1978). Correction of the name Pseudotetraëdron polymorphum (Chlorophyceae). Journal of Phycology 14: 234 only.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Tsarenko, P.M. (2011). Sphaeropleales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 280-355. Ruggell: A.R.A. Gantner Verlag K.-G..
Description: Cells solitary or in groups, 4-90 &m wide, becoming bright orange in culture. Cells spherical, tetrahedral or saccate, the tetrahedral form occasionally persisting in mature cells or developing into four small processes. Cell walls smooth, up to 10 &m thick in P. polymorphum, with or without 4 or more short to long wall projections. Cells uninucleate when formed, becoming multinucleate, nuclear number corresponding to number of spores produced. Chloroplast single and massive, netlike; pyrenoid single and nonparietal in young cells, becoming multiple with age. Asexual reproduction by uninucleate aplanospores or uninucleate, biflagellate, naked zoospores, 4, 8, 16, 32, 64 (rarely 128) per sporangium; spore number depending on nuclear number and cell size. Zoospores, with two anterior contractile vacuoles and anterior nucleus, released in group in common vesicle. Chlorotetraedron from soil (2 species) or planktonic in eutrophic freshwater; reported from Australia, Europe, Asia, North America in both temperate and tropical conditions.. Species distinguished based on cell size and chloroplast morphology. Genus of uncertain taxonomic position and requires ultrastructural evaluation to clarify relationships.
Information contributed by: D. Garbary. The most recent alteration to this page was made on 12 Jun 2014 by M.D. Guiry.
Numbers of names and species: There are 3 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.
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.
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: 30 April 2002 by M.D. Guiry
Verified by: 12 June 2014 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44518
Please cite this record as:
M.D. 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 26 February 2020.