Nostochopsis H.C.Wood ex Bornet & Flahault, 1886

Holotype species: Nostochopsis lobata H.C.Wood ex Bornet & Flahault

Original publication and holotype designation: Bornet, É. & Flahault, C. (1886 '1887'). Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France (Troisième fragment). Annales des Sciences Naturelles, Botanique, Septième série 5: 51-129.

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Description: Thallose, thallus attached to the substrate, gelatinous, irregularly subspherical, spherical or lobate, with more or less smooth, mucilaginous surface, solid or hollow in the center, up to 3.5 cm in diam., bluish, olive-green or yellow-green. Common mucilage usually homogeneous, colorless or yellowish-brown. Filaments oriented inside colony more or less radially, commonly branched, slightly coiled, with fine, gelatinous, diffluent (mainly in marginal parts), colorless or yellow-brown sheaths. Trichomes always uniseriate, composed of isodiametric, barrel-shaped or elongated (to twice longer than wide), ellipsoidal, blue-green cells. Branching true, lateral (T- or V-type); branches long, many-celled, cylindrical, terminated by slightly narrowed or widened, rounded apical cells, or very short, cylindrical (one to several-celled) branches, terminated by heterocytes. Heterocytes intercalary (bipored), lateral (unipored) or terminal (unipored). Akinetes not known. Cells divide crosswise, sometimes in meristematic (mainly apical) zones. Reproduction mainly by hormogonia with short barrel-shaped cells; hormogonia germinate bipolar. Freshwater; all species grow attached (old colonies later sometimes free floating) to mosses, stones and submersed wood in unpolluted creeks and streams, known over the whole tropical zone (one variable species or several taxa ?). Rarely found also in temperate zone, sometimes from stagnant pools (different species ?).

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-06 by M.D. Guiry.

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: Strunecký, 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.

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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=43601

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 18 April 2024