''Sirogonium'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of filamentous
charophyte
Charophyta () is a group of freshwater green algae, called charophytes (), sometimes treated as a phylum, division, yet also as a superdivision or an unranked clade. The terrestrial plants, the Embryophyta emerged within Charophyta, possibly fro ...
green algae
The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/Streptophyta. The land plants (Embryophytes) have emerged deep in the Charophyte alga as ...
of the
order Zygnematales
The Zygnematales ( el, ζυγός (''zygós'') and νῆμα (''nḗma'') ( nom.), νήματος (''nḗmatos'') (gen.)), also called the Conjugatales, are an order of green algae, comprising several thousand different species in two families. ...
. It is found in
freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...
areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115
μm in width. Each cell contains 2–10 chloroplasts in a ribbon, in contrast to the closely related genus ''
Spirogyra
''Spirogyra'' (common names include water silk, mermaid's tresses, and blanket weed) is a genus of filamentous charophyte green algae of the order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is characteris ...
'', which has chloroplasts in a coil.
Species
The following species are currently accepted:
* ''
Sirogonium calosporum''
Zhu
* ''
Sirogonium ceylanicum''
Wittrock
* ''
Sirogonium decoratum''
Prescott
* ''
Sirogonium denticulatum''
W.J.Zhu
* ''
Sirogonium floridanum''
(Transeau) G.M.Smith
* ''
Sirogonium fuscosporum''
Woodhead & Tweed
* ''
Sirogonium guangzhouense''
Zhu
* ''
Sirogonium hui
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
(L.C.Li) Transeau
* ''
Sirogonium illinoisense''
(Transeau) G.M.Smith
* ''
Sirogonium indicum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Singh
* ''
Sirogonium inflatum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Dixit
* ''
Sirogonium kamatii
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Kadlubowska
* ''
Sirogonium khoriense
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Masud-ul-Hassan & M.Nizamuddin
* ''
Sirogonium melanosporum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
(Randhawa) Transeau
* ''
Sirogonium phacosporum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Skuja
* ''
Sirogonium pseudofloridanum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
(Prescott) Transeau
* ''
Sirogonium reticulatum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Randhawa
* ''
Sirogonium retroversum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
H.C.Wood
* ''
Sirogonium sticticum
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
(Smith) Kützing
* ''
Sirogonium vandalurense
''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...
''
Iyengar
* ''
Sirogonium ventersicum''
Transeau
References
* John Whitton, B.A. and Brook, A.J. (editors) 2002. ''The Freshwater Algal Flora of the British Isles.'' Cambridge University Press, Cambridge. .
{{Taxonbar, from=Q22286377
Zygnemataceae