Monoraphidium Komárková-Legnerová, 1969
Holotype species: Monoraphidium griffithii (Berkeley) Komárková-Legnerová
Original publication and holotype designation: Komárková-Legnerová, J. (1969). The systematics and ontogenesis of the genera Ankistrodesmus Corda and Monoraphidium gen. nov. In: Studies in Phycology. (Fott, B. Eds), pp. 75-144. Prague: Academia Publishing House of the Czechosolvak Academy of Sciences.
Description: Plant unicellular, not embedded in mucilage envelope. Cells 2-182 x 1-8 µm, straight to lunate to sigmoid or helically twisted, often with elongate ends. Cell walls smooth. Cells uninucleate; chloroplast single and parietal; pyrenoid absent or when present, compound and without stach envelope. Asexual reproduction by autospores, 2-16 per sporangium, produced in one or two parallel series; released by longitudinal or transverse rupture of parental wall. Flagellated stages and sexual reproduction unknown. Monoraphidium planktonic or attached in freshwater or in soil; reported from Europe, Asia, North America.
Information contributed by: D. Garbary & F. Hindák. The most recent alteration to this page was made on 2020-03-11 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 neuter.
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..
Comments: Attached species without differentiation at poles. GC content of DNA determined for M. minutum at 71%. Among a group of tested algae, this species had an unusualy high level of methylation with 11.5% of the total nucleosides. Species distinguished based on cell size and shape. Genus segregated from Ankistrodesmus based on unicellular nature, and seriate development of autospores; distinguished from Keratococcus which has pyrenoids with starch envelope.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43438
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 11 March 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 31 May 2023