Radiococcus Schmidle, 1902

Holotype species: Radiococcus nimbatus (De Wildeman) Schmidle

Original publication and holotype designation: Schmidle, W. (1902). Ueber die Gattung Radiococcus Schmidle n. gen. Allgemeine botanische Zeitschrift für Systematik, Floristik, Pflanzengeographie 8: 41-42.

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Description: Colonial, free-floating algae with typically up to 16 globular cells immersed in thick mucilaginous envelope to 250 &m diameter, with or without radially aligned striations in mucilage. Cells 3-15 &m diameter, mostly with smooth cell walls, occasionally with several verrucose outgrowths. Cells often tetrahedrally arranged, though occasionally in rings or dispersed. Cells uninucleate; chloroplast single and parietal, with single pyrenoid. Asexual reproduction by autospores; (4-) 8 per sporangium; release accompanied by fragmentation of parental cell wall into as many fragments as spores produced. Cell wall fragments remaining distinct in mucilage for some time before being dissolved. Flagellated stages and sexual reproduction unknown. Radiococcus planktonic in freshwater; reported from Europe and North America, probably more widely distributed. Species distinguished based on colony shape and cell size; one species, R. subcylindricus apparently without pyrenoids. Genus similar to Korschpalmella which does not have pyrenoids.

Information contributed by: D. Garbary & A. Comas. 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 masculine.

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..

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44271

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 26 November 2024