Holotype species: Chroococcidiopsis thermalis Geitler
Original publication and holotype designation: Geitler, L. (1933). Diagnosen neuer Blaualgen von den Sunda-Inseln. Arch. Hydrobiol. Suppl. 12: 622-634.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Komárek, J., Kastovsky, J., Mares, J. & Johansen, J.R. (2014). Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014, using a polyphasic approach. Preslia 86: 295-335.
Description: Unicellular; spherical cells, rarely solitary, sometimes gathered in free-living irregular agglomerations or forming more or less spherical or irregular colonies. Cells or small groups of cells are enveloped by thin, firm, colorless, sometimes slightly layered sheaths (envelopes), which split during the liberation of daughter cells. Cells spherical or irregularly spherical, with a blue-green, yellowish, grayish or reddish content, sometimes slightly granular. Thylakoids usually distributed irregularly over the whole cell volume. Division of enlarged cells by different modes: (I) successively in different planes in succeeding generations (daughter cells usually do not grow into the original shape and size before next division with the exception of liberated cells; within sheath, daughter cells of different size sometimes occur); (ii) by successive or almost spontaneous irregular cell division (multiple fission) into immotile nanocytes, liberated from the enveloping sheath by an opening (or combined with gelatinization of sheaths). Reproduction by liberated daughter cells or clusters of ensheathed cells. Ecologically interesting genus: many species grow in different extreme biotopes, in periphyton of thermal and mineral springs, katharobic springs, alkaline or hypersaline swamps, aerophytic or endolithic in stones in hot or Antarctic deserts, in polar regions, or symbiotic with lichens. Several species have cosmopolitan distribution, only occurring in their special biotopes.
Information contributed by: J. Komárek. The most recent alteration to this page was made on 8 Apr 2017 by M.D. Guiry.
Numbers of names and species: There are 19 species names in the database at present, of which 18 have 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):
Click here to also show infraspecific names in the list below.
Komárek, J. (2003). Coccoid and colonial cyanobacteria. In: Freshwater Algae of North America. Ecology and Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 59-116. Amsterdam Boston London New York Oxford Paris San Diego San Fransisco Singapore Sydney Tokyo: Academic Press.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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 August 2002 by Elizabeth Moran
Verified by: 08 April 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44945
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 25 March 2019.