# Cyclosorus

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{{Short description|Genus of ferns}}
{{automatic taxobox
| image = Starr 061108-9784 Cyclosorus interruptus.jpg
| image_caption = ''[Cyclosorus interruptus](/source/Cyclosorus_interruptus)'' 
| taxon = Cyclosorus
| authority = [Link](/source/Johann_Heinrich_Friedrich_Link)
}}

'''''Cyclosorus''''' is a genus of [fern](/source/fern)s in the family [Thelypteridaceae](/source/Thelypteridaceae), subfamily Thelypteridoideae, in the [Pteridophyte Phylogeny Group](/source/Pteridophyte_Phylogeny_Group) classification of 2016 (PPG I).<ref name=PPGI/> Other sources sink ''Cyclosorus'' into a very broadly defined genus ''[Thelypteris](/source/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](/source/Sorus).<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](/source/Sensu)'', the rest needing in future to be distributed among other genera.<ref name=CFLW/>
*''[Cyclosorus angustipinnatus](/source/Cyclosorus_angustipinnatus)'' <small>C.Chr. & Tardieu ex Tardieu</small>
*''[Cyclosorus attenuatus](/source/Cyclosorus_attenuatus)'' <small>Ching ex K.H.Shing</small>
*''[Cyclosorus cuneatus](/source/Cyclosorus_cuneatus)'' <small>Ching ex K.H.Shing</small>
*''[Cyclosorus exindusiatus](/source/Cyclosorus_exindusiatus)'' <small>(W.H.Wagner) W.H.Wagner</small>
*''[Cyclosorus interruptus](/source/Cyclosorus_interruptus)'' <small>(Willd.) H.Itô</small>
*''[Cyclosorus jinghongensis](/source/Cyclosorus_jinghongensis)'' <small>Ching ex K.H.Shing</small>
*''[Cyclosorus lenormandii](/source/Cyclosorus_lenormandii)'' <small>(C.Chr.) Ching</small>
*''[Cyclosorus molundensis](/source/Cyclosorus_molundensis)'' <small>(Brause) Pic. Serm.</small>
*''[Cyclosorus nanxiensis](/source/Cyclosorus_nanxiensis)'' <small>Ching ex K.H.Shing</small>
*''[Cyclosorus parvifolius](/source/Cyclosorus_parvifolius)'' <small>Ching</small>
*''[Cyclosorus pygmaeus](/source/Cyclosorus_pygmaeus)'' <small>Ching & C.F.Zhang</small>
*''[Cyclosorus shimenensis](/source/Cyclosorus_shimenensis)'' <small>K.H.Shing & C.M.Zhang</small>
*''[Cyclosorus striatus](/source/Cyclosorus_striatus)'' <small>(Schum.) Ching</small>
*''[Cyclosorus subacutus](/source/Cyclosorus_subacutus)'' <small>Ching</small>
*''[Cyclosorus thailandicus](/source/Cyclosorus_thailandicus)'' <small>S.Linds.</small>
*''[Cyclosorus tottus](/source/Cyclosorus_tottus)'' <small>(Thunb.) Pic. Serm.</small>
*''[Cyclosorus wulingshanensis](/source/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

{{Taxonbar|from=Q5199019}}

Category:Thelypteridaceae
Category:Ferns of Asia
Category:Ferns of Australasia
Category:Fern genera
{{Polypodiales-stub}}

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