Schroederia Lemmermann, 1898: 311
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.
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.
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 (and infraspecific) names in the database at present, of which 6 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently 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):
Schroederia ancora G.M.Smith S
Schroederia antillarum Komárek S
Schroederia belonophora W.Schmidel S
Schroederia indica Philipose C
Schroederia jadayi G.M.Smith C
Schroederia judayi G.M.Smith S
Schroederia nitzschioides (G.S.West) Korschikov C
Schroederia planktonica (Skuja) Philipose P
Schroederia robusta Korshikov S
Schroederia setigera var. ancora G.M.Smith S
Schroederia setigera (Schröder) Lemmermann C - type
Schroederia spiralis (Printz) Korshikov C
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.
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.
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43391
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 May 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:6993