161,152 species and infraspecific names are in the database, 22,720 images, 62,678 bibliographic items, 473,290 distributional records.

Anabaenopsis V.V.Miller, 1923

Classification:
Empire Prokaryota
Kingdom Eubacteria
Subkingdom Negibacteria
Phylum Cyanobacteria
Class Cyanophyceae
Subclass Nostocophycidae
Order Nostocales
Family Aphanizomenonaceae

Lectotype species: Anabaenopsis elenkinii V.V.Miller

Original publication:Miller, V.V. (1923). K sistematike roda Anabaen a Bory. Arch. Russk. Protistol. 2: 116-126.

Type designated in Geitler, L. (1942). Schizophyta: Klasse Schizophyceae. In: Die natürlichen Pflanzenfamilien, Sweite Auflage. (Engler, A. & Prantl, K. Eds) Vol.1b, pp. 1-232. Leipzig: Wilhelm Engelmann.

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.

Nomenclatural notes
Authority cited as (Woloszynska) Miller in Komárek et al., 2010: 336. In INA Miller is cited as the authority; LT fide Geitler 1942: 181. [does not mention Woloszynska; in as much as LT was not one of W.'s species, her name cannot be placed in parentheses] [probably a coincidence , as Miller nowhere gives hint of having been aware of W. and omits her A.] - (25 Feb 2013) - Wendy Guiry

Description: Filamentous; filaments solitary or in free clusters with several tangled trichomes, free floating, along the length of the same width, without (rarely) or with constrictions at the cross walls, straight, arcuated or irregularly screw-like or spirally coiled, without sheaths, but sometimes with very diffluent, colourless, homogeneous slimy envelopes (staining!); trichomes originally metameric (the heterocytes develop intercalary in pairs in certain distances one from another), but trichomes often disintegrate soon after heterocyte formation between heterocytes, the position of which is finally terminal in short disintegrated fragments of an original trichome (usual stage of population). Cells cylindrical or barrel-shaped, shorter up to several times longer than wide, pale blue-green, usually containing aerotopes facultatively missing). Heterocytes develop after the asymmetrical, mirror-like division of two neighbouring proheterocytic cells, spherical or widely oval, rarely ovoid or elongated, rounded conical, usually slightly greater than vegetative cells. Akinetes spherical or oval, solitary or several in a short row, intercalar (rarely occur terminal after disintegration of trichomes), arise always paraheterocytic, but usually a slightly distant from heterocytes.

Cells divide cross-wise, sometimes asymmetrically, and grow to the original size before the next division; all cells capable to divide; without meristematic zones. Reproduction by trichome fragmentation and by akinetes.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 3 Mar 2015 by M.D. Guiry.

Comments: Planktonic species sometimes form water blooms, rarely occur in metaphyton of small aquatic bodies with submersed vegetation and in paddy fields. Non-planktonic species need revision. Found mainly in tropical and subtropical regions, but commonly during summer in warmer areas of temperate zones. Several species prefer alkaline and highly mineral or saline waters

Numbers of names and species: There are 37 species names in the database at present, as well as 24 infraspecific names. Of the species names, 32 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.

References
Thomazeau, S., Houdan-Fourmont, A., Couté, A., Duval, C., Couloux, A., Rousseau, F. & Bernard, C. (2010). The contribution of sub-Saharan African strains to the phylogeny of cyanobacteria: focusing on the Nostacaceae (Nostocales, Cyanobacteria). Journal of Phycology 46(3): 564-579.

Komárek, J., Zapomelova, E. & Hindak, F. (2010). Cronbergia gen. nov., a new cyanobacterial genus (Cyanophyta) with a special strategy of heterocyte formation. Cryptogamie Algologie 31(3): 321-341.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Contributors
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: 03 March 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43591

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 23 April 2021.

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