Aphanocapsa C.Nägeli, 1849
Holotype species: Aphanocapsa parietina (Nägeli ex Kützing) Nägeli
Original publication and holotype designation: Nägeli, C. (1849). Gattungen einzelliger Algen, physiologisch und systematisch bearbeitet. Neue Denkschriften der Allg. Schweizerischen Gesellschaft für die Gesammten Naturwissenschaften 10(7): i-viii, 1-139, pls I-VIII.
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: Colonies many-celled, irregular, usually amorphic, microscopic (mainly benthic, planktonic, periphytic, metaphytic) or macroscopic (periphytic, aerophytic, epipelic), gelatinous, with irregularly, loosely or densely distributed cells; mucilage colorless, fine, diffluent or limited (in small, microscopic colonies), rarely yellowish, brownish or bluish (mainly in macroscopic colonies); cells without own mucilaginous envelopes. Cells spherical, after division hemispherical, pale grayish blue or blue-green, rarely bright blue-green or olive-green, sometimes with visible peripheral chromatoplasm, in planktonic species rarely with aerotopes (revision !); sometimes with granular content or with several prominent granules. Cell division always in 2 perpendicular planes in successive generations; the daughter cells separate soon from one another within the colonial mucilage and grow into the original size and spherical shape before the next division. Reproduction by the dissociation of colonies, sometimes up to small groups of cells, and by solitary cells liberated from a colony. Most species grow in periphyton, benthos and metaphyton of stagnant and streaming freshwater biotopes (usually with clear water, common in lakes), several species are known from the sea littoral (psammon, periphyton), thermal springs, or from subaerophytic or submerged endolithic biotopes. Characteristic species grow subaerophytically on wet rocks and walls or among mosses in moors and peat bogs. Planktonic species need revision (type of cell division). Distributed worldwide, but several species are ecologically sharply limited and occur in geographically limited areas.
Information contributed by: J. Komárek. The most recent alteration to this page was made on 3 Mar 2015 by M.D. Guiry.
Numbers of names and species: There are 87 species names in the database at present, as well as 25 infraspecific names. Of the species names, 67 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: 28 December 2000 by M.D. Guiry
Verified by: 03 March 2015 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43069
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 18 September 2019.