{{short description|Genus of algae}} {{Automatic taxobox | image = Radiofilum conjunctivum 358633818.jpg | image_caption = ''Radiofilum conjunctivum'' | taxon = Radiofilum | authority = Schmidle, 1894 | type_species = ''Radiofilum conjunctivum'' | type_species_authority = Schmidle<ref name=AlgaeBase/> | subdivision_ranks = Species | subdivision = * ''Radiofilum conjunctivum'' * ''Radiofilum transversale'' }}
'''''Radiofilum''''' is a genus of green algae in the class Chlorophyceae.<ref name=AlgaeBase>{{AlgaeBase genus|name=Radiofilum|id=43491}}</ref> It is a freshwater genus; they are often found in soft, boggy or acidic waters.<ref name=Matthews>{{cite journal | date = 2016 | last1=Matthews | first1=Robin A. | title=Freshwater Algae in Northwest Washington, Volume II, Chlorophyta and Rhodophyta | url= https://cedar.wwu.edu/cedarbooks/1/ | journal = A Collection of Open Access Books and Monographs | publisher = Western Washington University | doi=10.25710/fctx-n773 }}</ref>
''Radiofilum'' consists of unbranched filaments of cells, surrounded by a very thin mucilage layer. Cells are bead-like, spherical or compressed. The cell wall consists of two halves, and there is a ring around the middle of the cell where the two halves are joined. Cells contain a chloroplast is parietal and contains one or more pyrenoids.<ref name=Matthews/>
The genus ''Radiofilum'' as currently circumscribed appears to be a polyphyletic grouping of species. Some work has been done to transfer species to other genera,<ref name=Shubert2014>{{cite book |editor-first1=John D.|editor-last1=Wehr|editor-first2=Robert G.|editor-last2=Sheath|editor-first3=J. Patrick|editor-last3=Kociolek |date= 2014 |edition=2 |title= Freshwater Algae of North America: Ecology and Classification |last1= Shubert|first1=Elliot| last2=Gärtner |first2=Georg |chapter= Chapter 7. Nonmotile Coccoid and Colonial Green Algae |url= |location= |publisher= Elsevier Inc. |page= |isbn=978-0-12-385876-4 }}</ref> including ''Interfilum''<ref name=Shubert2014/> and ''Flintia''.<ref>{{cite journal|title=''Flintia'', gen. nov. a replacement genus name for the invalid genus name ''Parallela'' E.A.Flint (Microsporaceae, Chlorophyceae)|last1= Molinari-Novoa|first1=E. A.|last2=Guiry|first2=M. D.|date=2020|journal=Notulae Algarum|volume=168|pages=1–3}}</ref> The type species, ''Radiofilum conjunctivum'', belongs to the class Trebouxiophyceae and is phylogenetically close to the genus ''Microthamnion''.<ref name=Shubert2014/>
==References== {{Reflist|1}}
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Category:Sphaeropleales genera Category:Sphaeropleales Category:Freshwater algae {{Chlorophyceae-stub}}