Anabaenopsis V.V.Miller, 1923

Lectotype species: Anabaenopsis elenkinii V.V.Miller

Original publication: Miller, V.V. (1923). K sistematike roda Anabaena Bory [On the systematics of the genus Anabaena Bory]. Arkhiv Russkogo Protistologicheskogo Obshchestva 2: 116-126, 5 figures. [in Russian with German abstract]

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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.

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. Kom√°rek. The most recent alteration to this page was made on 2023-07-13 by E.A. Molinari Novoa.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Struneck√Ĺ, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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

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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.

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

Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 13 July 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 01 December 2023

 
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