160,997 species and infraspecific names are in the database, 22,719 images, 62,619 bibliographic items, 473,223 distributional records.

Gloeocapsa Kützing, 1843, nom. cons.

Empire Prokaryota
Kingdom Eubacteria
Subkingdom Negibacteria
Phylum Cyanobacteria
Class Cyanophyceae
Subclass Oscillatoriophycidae
Order Chroococcales
Family Microcystaceae

Holotype species: Gloeocapsa atrata Kützing

Original publication and holotype designation: Kützing, F.T. (1843). Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.
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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-colonial; colonies microscopic, small in a form of irregular aggregations, or large, up to macroscopic, gelatinous, amorphous, sometimes covering large areas of wet stony substrates; colonies composed of groups of cells, which are closed in mucilaginous, usually wide and concentrically lamellated envelopes, in several species intensely reddish, bluish, orange or yellowish colored; cells situated in colonies irregularly, more or less distant one from another, in old colonies in great numbers. Mucilaginous envelopes fine, but layered and limited; solitary cells produce soon after division their own, wide envelopes, which do not just copy the cell shape. Cells spherical, only shortly after division hemispherical, pale blue-green or olive-green, usually with slightly granular content. During vegetation cycles develop morphologically different stages, conditioned by ecological influences. Cell division in three perpendicular planes in successive generations; the daughter cells soon separate from one another after division, they develop their mucilaginous envelopes and grow into the original spherical shape and size before the next division. Reproduction by dissociation of colonies into small cell clusters or into solitary cells with narrow gelatinous envelopes. Nanocytic cell division known. The described akinetes are probably only resting stages with dense mucilaginous envelopes, caused by environmental, unfavorable conditions (status, ecomorphoses), not real akinetes as known in filamentous cyanophytes. Most species known from wet or dry, periodically moistened stony and rocky walls and from rocks with streaming water, distributed all over the world. The taxonomy of populations from different areas is not quite clear, but most species are considered worldwide in distribution. They occur mainly in mountains, but also in all other rocky areas, including the arid regions. Few species are periphytic and metaphytic in waters with aquatic plants, very rarely occur in plankton and secondary in cryoseston in high mountains.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 19 Oct 2015 by M.D. Guiry.

Numbers of names and species: There are 129 species names in the database at present, as well as 37 infraspecific names. Of the species names, 80 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: 11 April 2002 by M.D. Guiry

Verified by: 19 October 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43590

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 16 April 2021.

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