# Raphidocelis

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{{Short description|Genus of algae}}
{{Automatic taxobox
| taxon = Raphidocelis
| authority = Hindák
| type_species = ''Raphidocelis sigmoidea''<br /><small>Hindák</small>
| subdivision_ranks = Species
| subdivision_ref = <ref name=AlgaeBase/>
| subdivision = 
* ''[Raphidocelis arcuata](/source/Raphidocelis_arcuata)''
* ''[Raphidocelis danubiana](/source/Raphidocelis_danubiana)''
* ''[Raphidocelis extensa](/source/Raphidocelis_extensa)''
* ''[Raphidocelis inclinata](/source/Raphidocelis_inclinata)''
* ''[Raphidocelis mayorii](/source/Raphidocelis_mayorii)''
* ''[Raphidocelis microscopica](/source/Raphidocelis_microscopica)''
* ''[Raphidocelis mucosa](/source/Raphidocelis_mucosa)''
* ''[Raphidocelis pseudomucosa](/source/Raphidocelis_pseudomucosa)''
* ''[Raphidocelis roselata](/source/Raphidocelis_roselata)''
* ''[Raphidocelis rotunda](/source/Raphidocelis_rotunda)''
* ''[Raphidocelis sigmoidea](/source/Raphidocelis_sigmoidea)''
* ''[Raphidocelis subcapitata](/source/Raphidocelis_subcapitata)''
* ''[Raphidocelis turfosa](/source/Raphidocelis_turfosa)''
* ''[Raphidocelis valida](/source/Raphidocelis_valida)''
* ''[Raphidocelis van-goorii](/source/Raphidocelis_van-goorii)''
}}

'''''Raphidocelis''''' is a [genus](/source/genus) of [green algae](/source/green_algae) in the family [Selenastraceae](/source/Selenastraceae).<ref>See the [NCBI](/source/National_Center_for_Biotechnology_Information) [https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=307506 webpage on Raphidocelis].  Data extracted from the {{cite web | url=https://ftp.ncbi.nih.gov/pub/taxonomy/ | title=NCBI taxonomy resources | publisher=[National Center for Biotechnology Information](/source/National_Center_for_Biotechnology_Information) | access-date=2007-03-19}}</ref> They are found in [freshwater](/source/freshwater) habitats.<ref name=Bicudo_and_Menezes2006/>

One species, ''[Raphidocelis subcapitata](/source/Raphidocelis_subcapitata)'', is a common model organism in the field of [toxicology](/source/toxicology), where it is used as a [bioassay](/source/bioassay). It was previously known as ''Selenastrum capricornutum'', a name later shown to be incorrect.<ref name=Krienitz/>

==Description==
''Raphidocelis'' consists of solitary cells or of colonies of cells within a thin layer of mucilage. Cells are crescent-shaped, with pointed ends that may be twisted out of the plane of the cell. Each cell contains a single parietal [chloroplast](/source/chloroplast) filling the cell.<ref name=Bicudo_and_Menezes2006>{{cite book | title= Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições | edition=2 | year=2006 | first1=Carlos E. M. |last1=Bicudo | first2=Mariângela | last2= Menezes | publisher= RiMa Editora | pages=508 | isbn= 857656064X }}</ref> ''Raphidocelis'' is sometimes reported as lacking a pyrenoid; it does indeed contain one, although it is not covered in layer of starch grains making it often difficult to observe under the [light microscope](/source/light_microscope).<ref name=Krienitz>{{cite journal | doi=10.1111/j.1529-8817.2011.01010.x | title= SSU rRNA gene phylogeny of morphospecies affiliated to the bioassay alga "Selenastrum capricornutum" recovered the polyphyletic origin of crescent-shaped Chlorophyta | year=2011 | last1=Krienitz | first1=Lothar | last2=Bock | first2=Christina | last3=Nozaki | first3=Hisayoshi | last4=Wolf | first4=Matthias | journal=Journal of Phycology | volume=47 | issue=4 | pages=880–893 | pmid=27020023 | bibcode= 2011JPcgy..47..880K | s2cid=1291369 }}</ref>

''Raphidocelis'' reproduces asexually by [autospore](/source/autospore)s; zoospores and sexual reproduction have not been observed in this genus.<ref name=AlgaeBase>{{AlgaeBase genus|Raphidocelis|id=43448|access-date=2023-05-15}}</ref>

==References==
{{Reflist|1}}

{{Taxonbar|from=Q7294077}}

Category:Sphaeropleales genera
Category:Sphaeropleales
Category:Freshwater algae

{{Chlorophyceae-stub}}

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Adapted from the Wikipedia article [Raphidocelis](https://en.wikipedia.org/wiki/Raphidocelis) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Raphidocelis?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.