155,278 species and infraspecific names are in the database, 21,865 images, 60,056 bibliographic items, 436,069 distributional records.

Schroederia Lemmermann, 1898

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

Holotype species: Schroederia setigera (Schröder) Lemmermann

Original publication and holotype designation: Lemmermann, E. (1898). Beiträge zur Kenntnis der Planktonalgen. 1. Hedwigia 37: 303-312.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Fuciková, K., Lewis, P.O. & Lewis, L.A. (2014). Putting incertae sedis taxa in their place: a proposal for ten new families and three new genera in Sphaeropleales (Chlorophyceae, Chlorophyta). Journal of Phycology 50(1): 14-25.

Description: Solitary, free living cells, prior to reproduction becoming segmented with serially aligned protoplasts. Cells fusiform or spindle shaped, straight, curved or sinuate, with two polar appendages of similar morphology. Appendages straight or curved to 60 µm long. Cells, including appendages, 11-200 x 3-28 µm, with smooth cell walls. Cells uninucleate when young, later multinucleate; band shaped, parietal chloroplast initially single, later multiple prior to reproduction; chloroplasts with one or more pyrenoids, in S. setigera not traversed by thylakoids. Asexual reproduction by biflagellate zoospores and akinetes; spores released by tear in lateral wall. Zoospores with anterior contractile vacuoles and cup shaped chloroplast with single pyrenoid and stigma. Thick walled akinetes produced at end of growth season. Sexual reproduction unknown. Schroederia planktonic in tropical and temperate freshwaters in variety of habitats; genus essentially cosmopolitan although some species endemic.

Information contributed by: D.J. Garbary & T. Kalina. The most recent alteration to this page was made on 2 Apr 2014 by Wendy Guiry.

Comments: Genus uncommon in North America, although many purported records are Ankyra spp. Pseudoschroderia recently segregated from Schroederia based on ultrastructural features of cell walls. Genus assigned by some authors to subfamily Schroederioideae with Paradoxia, Ankyra and Korshikoviella. Species distinguished by differences in cell size and shape and morphology of appendages.

Numbers of names and species: There are 12 species names in the database at present, as well as 2 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
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.

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..

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: 02 April 2014 by Wendy Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43391

Citing AlgaeBase
Please cite this record as:
Wendy 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 27 May 2019.

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