Stigeoclonium Kützing, 1843, nom. cons.
Holotype species: Stigeoclonium tenue (C.Agardh) 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.
Request PDFDescription: Plants consisting of variously developed prostrate and erect systems of uniseriate filaments. Erect filaments alternately, oppositely or dichotomously branched. Branches whorled or irregular, with tips pointed, narrowly obtuse or bearing a multicellular hyaline hair. Prostrate filaments form creeping or rhizoidal system, occasionally aggregated into pseudoparenchymatous disc. Cells uninucleate, thick or thin-walled, cylindrical or swollen, each with a single parietal chloroplast and one to several pyrenoids. Asexual reproduction by quadriflagellate zoospores of two sizes, micro- and macrozoospores. Sexual reproduction isogamous, by biflagellate or quadriflagellate gametes. Stigeoclonium common freshwater genus growing on a wide range of different surfaces. Species delimitation now based principally on features of the prostrate system and ones associated with germination of the zoospores. An extremely polymorphic genus most of whose members are best defined after growth in carefully defined culture conditions. Modern culture-based studies have led to recognition of just 3 species and suggestion that most of the 23 or more described in the earlier literature are merely environmentally-induced forms. All species so far investigated ultrastructurally have plasmodesmata and membranes closely appressed to pyrenoids. In a few species phycoplast observed.
Information contributed by: D.M. John. The most recent alteration to this page was made on 2024-03-07 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 neuter.
Most recent taxonomic treatment adopted: John, D.M. (2002). Orders Chaetophorales, Klebshormidiales, Microsporales, Ulotrichales. In: The Freshwater Algal Flora of the British Isles. An identification guide to freshwater and terrestrial algae. (John, D.M., Whitton, B.A. & Brook, A.J. Eds), pp. 433-468. Cambridge: Cambridge University Press.
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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=43369
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 March 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 April 2024
