Ferricystis F.Hindák, 1988
Holotype species: Ferricystis mucicola Hindák
Original publication and holotype designation: Hindák, F. (1988). Studies on the chlorococcal algae (Chlorophyceae). IV. Biologické Práce 34(1/2): 1-264.
Taxonomic status: currently recognized as a distinct genus.
Description: Thalli unicellular and microscopic, comprised of spherical to broadly oval cells without mucilaginous envelope and attached to substratum. Cells 6-12 &m in diameter. Cell walls colorless to dark brown, highly roughened with granular encrustations. Cells uninucleate; chloroplast single and parietal with one pyrenoid. Asexual reproduction by biflagellate zoospores or aplanospores; 4 per sporangium. Zoospores released through an opening in cell wall that occasionally has short collar; aplanospores released by breaking parental cell wall as they expand. Zoospores oval, 6-7 x 3 &m, with apical, backwardly directly 7-8 &m long flagella, two apical contractile vacuoles and eyespot. Aplanospores develop from zoospores which are not released and then develop into vegetative cells. Ferricystis grows in mucilage of Microcystis aeruginosa in the plankton; known only from single reservoir in Slovakia. Zoospores presumed involved in infecting new Microcystis colonies. Genus similar to Chlorococcum from which it differs based on the presence of rough cell wall encrustations.
Information contributed by: D. Garbary. The most recent alteration to this page was made on 2 Sep 2014 by M.D. Guiry.
Numbers of names and species: There is only one species or infraspecific name in the database at present, which has been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
Names: ('C' indicates a name that is 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):
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.
Created: 27 September 2004 by Robert Wilkes
Verified by: 02 September 2014 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=47446
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 May 2019.