{{Short description|Genus of ferns}} {{automatic taxobox | image = Starr 061108-9784 Cyclosorus interruptus.jpg | image_caption = ''Cyclosorus interruptus'' | taxon = Cyclosorus | authority = Link }}
'''''Cyclosorus''''' is a genus of ferns in the family Thelypteridaceae, subfamily Thelypteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I).<ref name=PPGI/> Other sources sink ''Cyclosorus'' into a very broadly defined genus ''Thelypteris'',<ref name=POWO_30005264-2/> or expand the genus to include other genera which PPG I keeps separate. Thus the online ''Flora of China'' suggests there are about 250 species compared to the two species suggested in PPG I.<ref name="FoC">{{citation |first1=Youxing |last1=Lin |first2=Zhongyang |last2=Li |first3=Kunio |last3=Iwatsuki |contribution=Cyclosorus |contribution-url=http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=108865 |accessdate=2020-01-16 |editor-last=Wu |editor-first=Zhengyi |editor2-last=Raven |editor2-first=Peter H. |editor3-last=Hong |editor3-first=Deyuan <!--|year=1994 onwards--> |title=Flora of China ''(online)'' |publisher=eFloras.org |url=http://www.efloras.org/flora_page.aspx?flora_id=2 |name-list-style=amp }} </ref><ref name=PPGI/>
There are also fossil species known from the Eocene of South China<ref>A new find of the fossil ''Cyclosorus'' from the Eocene of South China and its paleoclimatic implication. Serge V. Naugolnykh, Li Wang, Meng Han and Jian-Hua Jin; 2016, Journal of Plant Research. 129 (1), pages 3–12, {{doi|10.1007/s10265-015-0765-0}}</ref> and the Quaternary of Australia.
The genus is named from the Greek, referring to the circular sori.<ref>Les Robinson - Field Guide to the Native Plants of Sydney, {{ISBN|978-0-7318-1211-0}} page 320</ref>
==Species== {{As of|2020|January|}}, the ''Checklist of Ferns and Lycophytes of the World'' accepted the following extant species, although noting that only two to four probably belonged in the genus ''sensu stricto'', the rest needing in future to be distributed among other genera.<ref name=CFLW/> *''Cyclosorus angustipinnatus'' <small>C.Chr. & Tardieu ex Tardieu</small> *''Cyclosorus attenuatus'' <small>Ching ex K.H.Shing</small> *''Cyclosorus cuneatus'' <small>Ching ex K.H.Shing</small> *''Cyclosorus exindusiatus'' <small>(W.H.Wagner) W.H.Wagner</small> *''Cyclosorus interruptus'' <small>(Willd.) H.Itô</small> *''Cyclosorus jinghongensis'' <small>Ching ex K.H.Shing</small> *''Cyclosorus lenormandii'' <small>(C.Chr.) Ching</small> *''Cyclosorus molundensis'' <small>(Brause) Pic. Serm.</small> *''Cyclosorus nanxiensis'' <small>Ching ex K.H.Shing</small> *''Cyclosorus parvifolius'' <small>Ching</small> *''Cyclosorus pygmaeus'' <small>Ching & C.F.Zhang</small> *''Cyclosorus shimenensis'' <small>K.H.Shing & C.M.Zhang</small> *''Cyclosorus striatus'' <small>(Schum.) Ching</small> *''Cyclosorus subacutus'' <small>Ching</small> *''Cyclosorus thailandicus'' <small>S.Linds.</small> *''Cyclosorus tottus'' <small>(Thunb.) Pic. Serm.</small> *''Cyclosorus wulingshanensis'' <small>C.M.Zhang</small>
== References == {{Reflist|refs= <ref name=CFLW>{{Citation |mode=cs1 |last1=Hassler |first1=Michael |last2=Schmitt |first2=Bernd |date=January 2020 |contribution=Cyclosorus |title=Checklist of Ferns and Lycophytes of the World |at=8.20 |url=https://worldplants.webarchiv.kit.edu/ferns/ |accessdate=2020-01-16 |name-list-style=amp |archive-date=2017-09-02 |archive-url=https://web.archive.org/web/20170902225743/http://worldplants.webarchiv.kit.edu/ferns/ |url-status=dead }}</ref>
<ref name=POWO_30005264-2>{{citation |title=''Cyclosorus'' Link |work=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30005264-2 |accessdate=2020-01-16 }}</ref>
<ref name=PPGI>{{citation |mode=cs1 |author=PPG I |year=2016 |title=A community-derived classification for extant lycophytes and ferns |journal=Journal of Systematics and Evolution |volume=54 |issue=6 |pages=563–603 |doi=10.1111/jse.12229|s2cid=39980610 |doi-access=free }}</ref> }}
== External links == * {{Commons category-inline|Cyclosorus|'''Cyclosorus'''}} * {{fossilworks|id=319848|title=''Cyclosorus'' |date= }} * [http://www.tropicos.org/Name/40019416?tab=subordinatetaxa ''Cyclosorus''] at Tropicos
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Category:Thelypteridaceae Category:Ferns of Asia Category:Ferns of Australasia Category:Fern genera {{Polypodiales-stub}}