149,429 species and infraspecific names are in the database, 20,332 images, 57,470 bibliographic items, 379,327 distributional records.

Stigeoclonium Kützing, 1843, nom. cons.

Empire Eukaryota
Kingdom Plantae
Subkingdom Viridiplantae
Infrakingdom Chlorophyta infrakingdom
Phylum Chlorophyta
Subphylum Chlorophytina
Class Chlorophyceae
Order Chaetophorales
Family Chaetophoraceae

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.
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Taxonomic status: currently recognized as a distinct genus.

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.

Description: 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 19 Oct 2015 by M.D. Guiry.

Common names

(as Stigeoclonium)
Swedish: Skivtofsar (Tolstoy & Österlund 2003).

NCBI Nucleotide Sequences

Numbers of names and species: There are 94 species (and infraspecific) names in the database at present, of which 49 have been flagged as currently accepted taxonomically.

Names: ('C' indicates a name that is currently 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):

Stigeoclonium aestivale (Hazen) Collins C 
Stigeoclonium alkaliense Noda U 
Stigeoclonium amoenum var. insigne (Nägeli) Islam P 
Stigeoclonium amoenum var. aucklandicum A.K.M.N.Islam C 
Stigeoclonium amoenum Kützing C 
Stigeoclonium amoenum var. novizelandicum Nordstedt C 
Stigeoclonium askenasyi Schmidle C 
Stigeoclonium attenuatum (Hazen) Collins C 
Stigeoclonium australense K.Möbius C 
Stigeoclonium biasolettianum (Kützing) Kützing C 
Stigeoclonium bifurcatum N.Islam & M.R.Khan C 
Stigeoclonium carolinianum Islam C 
Stigeoclonium condensatum (Hassall) Kützing C 
Stigeoclonium curvirostrum Skuja C 
Stigeoclonium elongatum (Hassall) Kützing C 
Stigeoclonium falklandicum (Kützing) Kützing C 
Stigeoclonium farctum var. rivulare Butcher C 
Stigeoclonium farctum Berthold C 
Stigeoclonium farctum var. anglicum Butcher C 
Stigeoclonium fasciculare var. amrutii Sarma C 
Stigeoclonium fasciculare var. henriquesii Sarma C 
Stigeoclonium fasciculare var. glomeratum (Hazen) A.K.Islam C 
Stigeoclonium fasciculare var. rangpurense N.Islam & M.R.Khan C 
Stigeoclonium fasciculare Kützing C 
Stigeoclonium fasciculare var. australense (K.Möbius) P.Sarma & Kargupta S 
Stigeoclonium fastigatum (Ralfs) Kützing S 
Stigeoclonium flagelliferum var. crassiusculum (Kützing) Rabenhorst U 
Stigeoclonium flagelliferum Kützing C 
Stigeoclonium geraldii A.K.Islam C 
Stigeoclonium glomeratum (Hazen) Collins S 
Stigeoclonium gracile (Kützing) Kützing C 
Stigeoclonium gracile (West & G.S.West) Tiffany C 
Stigeoclonium helveticum Vischer C 
Stigeoclonium helveticum var. minus Vischer S 
Stigeoclonium huberi Heering C 
Stigeoclonium indicum P.Sarma & Kargupta C 
Stigeoclonium irregulare Kützing S 
Stigeoclonium islamii Sarma C 
Stigeoclonium longearticulatum var. ulotrichoides Teodoresco P 
Stigeoclonium longearticulatum (Hansgirg) Heering S 
Stigeoclonium longipilum var. natorense N.Islam & M.R.Khan C 
Stigeoclonium longipilum var. cylindricum A.K.Islam C 
Stigeoclonium longipilum Kützing C 
Stigeoclonium lubricum var. varians (Hazen) Collins S 
Stigeoclonium lubricum (Dillwyn) Kützing C 
Stigeoclonium lubricum var. nairii Sarma C 
Stigeoclonium lubricum var. nathanii Sarma C 
Stigeoclonium lubricum f. salinum Dixit C 
Stigeoclonium lumbricum f. salinum S.C.Dixit C 
Stigeoclonium macrocladium var. tomentosum Schmidle P 
Stigeoclonium najadeanum Skvortzov S 
Stigeoclonium nanum (Dillwyn) Kützing C 
Stigeoclonium nelsonii Prescott C 
Stigeoclonium nudiusculum (Kützing) Rabenhorst C 
Stigeoclonium nudiusculum var. lamii Sarma C 
Stigeoclonium ovisporum Y.X.Wei C 
Stigeoclonium pachydermum var. dinajpurense N.Islam & M.R.Khan C 
Stigeoclonium pachydermum Prescott C 
Stigeoclonium paihiae Islam S 
Stigeoclonium pascheri (Vischer) E.R.Cox & Bold S 
Stigeoclonium penicillatum var. antarcticum T.Mrozinska, M.Olech & A.Massalski C 
Stigeoclonium penicillatum A.K.Islam C 
Stigeoclonium plumosum Kützing S 
Stigeoclonium polymorphum (Franke) Heering C 
Stigeoclonium polyrhizum Jao S 
Stigeoclonium prolixum C.-C.Jao C 
Stigeoclonium prostratum F.E.Fritsch C 
Stigeoclonium protensum (Dillwyn) Kützing C 
Stigeoclonium pusillum (Lyngbye) Kützing C 
Stigeoclonium pygmaeum Hansgirg S 
Stigeoclonium sarmae N.Islam & M.R.Khan C 
Stigeoclonium segarae A.K.Islam C 
Stigeoclonium setigerum Kützing C 
Stigeoclonium simplex Kützing C 
Stigeoclonium simplicissimum Reinsch S 
Stigeoclonium spicatum Schmidle S 
Stigeoclonium stagnale Noda U 
Stigeoclonium stagnatile (Hazen) Collins C 
Stigeoclonium subsecundum var. tenuis Nordstedt S 
Stigeoclonium subsecundum var. javanicum Ritcher S 
Stigeoclonium subsecundum (Kützing) Kützing C 
Stigeoclonium subspinosum var. falklandicum Kützing S 
Stigeoclonium subspinosum Kützing C 
Stigeoclonium subuligerum Kützing C 
Stigeoclonium tenue var. gracile Kützing S 
Stigeoclonium tenue var. uniforme (C.Agardh) Kützing S 
Stigeoclonium tenue var. irregulare (Kützing) Rabenhorst S 
Stigeoclonium tenue (C.Agardh) Kützing C - type
Stigeoclonium tenue var. lubricum (Dillwyn) Rabenhorst S 
Stigeoclonium terrestre Iwanoff S 
Stigeoclonium thermale A.Braun C 
Stigeoclonium tibeticum Y.-X.Wei & H.J.Hu C 
Stigeoclonium uniforme (C.Agardh) Rabenhorst C 
Stigeoclonium variabile Nägeli C 

Caisová, L., Marin, B., Sausen, N., Proschold, T. & Melkonian, M. (2011). Polyphyly of Chaetophora and Stigeoclonium within the Chaetophorales (Chlorophyceae), revealed by sequence comparisons of nuclear-encoded SSU rRNA genes. Journal of Phycology 47(1): 164-177.

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: 11 April 2002 by M.D. Guiry

Verified by: 19 October 2015 by M.D. Guiry

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 October 2017.

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