Chlorococcum Meneghini, 1842, nom. cons.
Holotype species: Chlorococcum infusionum (Schrank) Meneghini
Original publication and holotype designation: Meneghini, G. (1843). Monographia Nostochinearum italicarum addito specimine de Rivulariis. Memorie della Reale Accademia delle Scienze di Torino, ser. 2 5: 1-143, pls I-XVII.
Description: Vegetative cells solitary or in temporary groups of indefinite form, never embedded in gelatin. Cells ellipsoidal to spherical and vary in size. Cell walls smooth. Parietal chloroplast with or without a peripheral opening and with one or more pyrenoids. Cells uniucleate, or multinucleate just prior to zoosporogenesis. Reproduction by zoospores, aplanospores, or isogametes. Motile cells have two equal flagella and remain ellipsoidal for a time after motility ceases (Chlamydomonas-type). This free-living genus is cosmopolitan.
Information contributed by: T.R. Deason, emend, Shin, Watanabe & Lewis (Watanabe & Lewis, 2017: 337). The most recent alteration to this page was made on 2020-05-12 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Most recent taxonomic treatment adopted: Tsarenko, P.M. (2011). Chlorococcales. In: Algae of Ukraine: diversity, nomenclature, taxonomy, ecology and geography. Volume 3: Chlorophyta. (Tsarenko, P.M., Wasser, S.P. & Nevo, E. Eds), pp. 232-264. Ruggell: A.R.A. Gantner Verlag K.-G..
Comments: Ultrastructure studies have shown that a phycoplast is present in at least some species and that the zoospores have clockwise absolute orientation of their basal bodies. Though primarily an edaphic alga, it has been reported from such diverse habitats as hot springs in Central Asia and soils collected in Antarctica. Aquatic, marine, and aerial isolates have been recorded. Physiological studies of several species have determined the effect of various nutrients and inhibitors on growth. The ability to produce certain enzymes and secondary carotenoids also has been determined. A serological study was performed to determine the relationship between Chlorococcum and Tetracystis which differs morphologically only in the ability of the latter to form tetrads by desmoschisis.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=37477
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 12 May 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 March 2023