153,875 species and infraspecific names are in the database, 21,014 images, 59,578 bibliographic items, 413,474 distributional records.

Paulschulzia Skuja, 1948

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

Holotype species: Paulschulzia pseudovolvox (P.Schultz) Skuja

Original publication and holotype designation: Skuja, H. (1948). Taxonomie des Phytoplanktons einiger Seen in Uppland, Schweden. Symbolae Botanicae Upsalienses 9(3): 1-399, 39 pls.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Tsarenko, P.M. (2011). Tetrasporales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 225-232. Ruggell: A.R.A. Gantner Verlag K.-G..

Description: Microscopic, spherical to ellipsoid colonies to 300 &m diameter with 4-64 (-248) cells in dispersed clusters embedded in extensive mucilaginous matrix. Entire aggregate with several generations of subcolonies with 4, 8 or 16 cells each with distinct envelope. Cells spherical to ovoid, 5-13 &m, with or without two anterior, non-motile pseudoflagella to 85 &m long, directed to exterior of colony; pseudoflagella rigid or lax. Cells uninucleate with two anterior contractile vacuoles; single parietal chloroplast cup shaped (stellate in P. pseudovolvox), with single basal pyrenoid with distinct starch sheath; stigma absent. Colony growth by division of cells into two or four to form new subcolonies, up to four generations of colonies within a single matrix; asexual reproduction by fragmentation of large colonies and by biflagellate zoospores, 5-7 x 3-4 &m, liberated from colonies. Young colonies with four tetrahedral cells. Sexual reproduction unknown. Paulschultzia planktonic in freshwater lakes; reported from Europe, North America and India. P. pseudovolvox available in culture collection (UTEX 167). Genus similar to Tetraspora but distinguished by formation of distinct subcolonies; some authors suggest recognizing Paulschulzia as subgenus of Tetraspora.

Information contributed by: D. Garbary & P. Kugrens. The most recent alteration to this page was made on 29 Jun 2012 by Michael Guiry.

Numbers of names and species: There are 4 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.

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: 29 June 2012 by Michael Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43484

Citing AlgaeBase
Please cite this record as:
Michael 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 16 December 2018.

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