Schroederia Lemmermann, 1898

Holotype species: Schroederia setigera (Schröder) Lemmermann

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

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 2021-09-06 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

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.

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.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 September 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 November 2024