Editing Cycad (section)

=== Fossil genera ===
The following extinct cycad genera are known:<ref>{{Cite web |title=PBDB |url=https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=55349 |access-date=2024-03-16 |website=paleobiodb.org}}</ref>

* ''[[Amuriella]]'' Late Jurassic, Russian Far East (leaf fragments)
* ''[[Androstrobus]]'' Triassic to Cretaceous, worldwide (leaf form genus)
* ''[[Antarcticycas]]'' Middle Triassic, Antarctica (known from the whole plant)<ref>{{Cite journal |last1=Hermsen |first1=Elizabeth J. |last2=Taylor |first2=Edith L. |last3=Taylor |first3=Thomas N. |date=January 2009 |title=Morphology and ecology of the ''Antarcticycas'' plant |journal=Review of Palaeobotany and Palynology |language=en |volume=153 |issue=1–2 |pages=108–123 |doi=10.1016/j.revpalbo.2008.07.005|bibcode=2009RPaPa.153..108H }}</ref>
* ?''[[Anthrophyopsis]]'' Late Triassic, worldwide (leaf form genus, possibly a [[Pteridospermatophyta|pteridospermatophyte]])<ref>{{Cite journal |last1=Xu |first1=Yuanyuan |last2=Popa |first2=Mihai Emilian |last3=Zhang |first3=Tingshan |last4=Lu |first4=Ning |last5=Zeng |first5=Jianli |last6=Zhang |first6=Xiaoqing |last7=Li |first7=Liqin |last8=Wang |first8=Yongdong |date=2021-09-01 |title=Re-appraisal of Anthrophyopsis (Gymnospermae): New material from China and global fossil records |url=https://www.sciencedirect.com/science/article/pii/S0034666721000993 |journal=Review of Palaeobotany and Palynology |volume=292 |pages=104475 |doi=10.1016/j.revpalbo.2021.104475 |bibcode=2021RPaPa.29204475X |issn=0034-6667|url-access=subscription }}</ref>
* ''[[Apoldia]]'' Triassic-Jurassic, Europe
* ''[[Archaeocycas]]'' Early Permian, Texas (leaf with sporophylls)
* ''[[Aricycas]]'' Late Triassic, Arizona (leaf form genus)
* ''[[Beania (plant)|Beania]]'' (=''Sphaereda''), Triassic to Jurassic, Europe & Central Asia (leaf form genus)
* ''[[Behuninia]]'' Late Jurassic, Colorado & Utah (fruiting structures)
* ''[[Bucklandia]]'' Middle Jurassic to Early Cretaceous, Europe and India (leaf form genus)
* ''[[Bureja (genus)|Bureja]]'' Late Jurassic, Russia
* ''[[Cavamonocolpites]]'' Early Cretaceous, Brazil (pollen)
* ''[[Crossozamia]]'' Early to Late Permian, China (leaf form genus)
* ''[[Ctenis]]'' Mesozoic-Paleogene, Worldwide (leaf form genus)
* ''[[Ctenozamites]]'' Triassic-Cretaceous, worldwide (leaf form genus)
* ''[[Cycadenia]]'' Triassic, Pennsylvania (trunks)
* ''[[Cycadinorachis]]'' Late Jurassic, India (rachis)
* ''[[Fascisvarioxylon]]'' Late Jurassic, India (petrified wood)
* ''[[Gymnovulites]]'', Latest Cretaceous/earliest Paleocene, India (seed)
* ''[[Heilungia]]'', Late Jurassic to early Cretaceous, Russia & Alaska (leaf form genus)
* ''[[Leptocycas]]'' Late Triassic, North Carolina & China (known from the whole plant)<ref>{{Cite journal |last1=Zhang |first1=Jian-Wei |last2=Yao |first2=Jian-Xin |last3=Chen |first3=Jia-Rui |last4=Li |first4=Cheng-Sen |date=2010-05-25 |title=A new species of Leptocycas (Zamiaceae) from the Upper Triassic sediments of Liaoning Province, China |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1759-6831.2010.00079.x |journal=Journal of Systematics and Evolution |language=en |volume=48 |issue=4 |pages=286–301 |doi=10.1111/j.1759-6831.2010.00079.x|bibcode=2010JSyEv..48..286Z }}</ref>
* ''[[Mesosingeria]]'', Jurassic to Early Cretaceous, Antarctica & Argentina (leaf form genus)
* ''[[Michelilloa]]'', Late Triassic, Argentina (stem)
* ?''[[Nikania]]'', Early Cretaceous, Russia (leaf fragments)
* ?''[[Nilssonia (plant)|Nilssonia]]'', Middle Permian to Late Cretaceous, worldwide (leaf form genus) (possibly not a cycad)<ref>{{Cite journal |last1=Vajda |first1=Vivi |last2=Pucetaite |first2=Milda |last3=McLoughlin |first3=Stephen |last4=Engdahl |first4=Anders |last5=Heimdal |first5=Jimmy |last6=Uvdal |first6=Per |date=August 2017 |title=Molecular signatures of fossil leaves provide unexpected new evidence for extinct plant relationships |url=https://www.nature.com/articles/s41559-017-0224-5 |journal=Nature Ecology & Evolution |language=en |volume=1 |issue=8 |pages=1093–1099 |bibcode=2017NatEE...1.1093V |doi=10.1038/s41559-017-0224-5 |issn=2397-334X |pmid=29046567 |s2cid=3604369}}</ref>
* ?''[[Nilssoniocladus]]'', Early to Late Cretaceous, United States & Russia (stems, likely associated with ''Nilssonia'', possibly [[deciduous]])<ref>{{Cite journal |last1=Spicer |first1=Robert A. |last2=Herman |first2=Alexey B. |date=1996-05-01 |title=Nilssoniocladus in the Cretaceous Arctic: new species and biological insights |url=https://dx.doi.org/10.1016/0034-6667%2895%2900111-5 |journal=Review of Palaeobotany and Palynology |volume=92 |issue=3 |pages=229–243 |doi=10.1016/0034-6667(95)00111-5 |bibcode=1996RPaPa..92..229S |issn=0034-6667|url-access=subscription }}</ref>
* ''[[Palaeozamia]]'', Middle Jurassic, England
* ''[[Paracycas]]'', Middle Jurassic to Late Jurassic, Europe and Central Asia
* ?''[[Phasmatocycas]]'', Late Carboniferous to Early Permian, Kansas, Texas & New Mexico (leaf with sporophylls)<ref>{{Cite journal |last1=Axsmith |first1=Brian J. |last2=Serbet |first2=Rudolph |last3=Krings |first3=Michael |last4=Taylor |first4=Thomas N. |last5=Taylor |first5=Edith L. |last6=Mamay |first6=Sergius H. |date=2003 |title=The Enigmatic Paleozoic plants Spermopteris and Phasmatocycas reconsidered |url=https://bsapubs.onlinelibrary.wiley.com/doi/10.3732/ajb.90.11.1585 |journal=American Journal of Botany |language=en |volume=90 |issue=11 |pages=1585–1595 |doi=10.3732/ajb.90.11.1585 |pmid=21653333 |bibcode=2003AmJB...90.1585A |issn=0002-9122|url-access=subscription }}</ref>
* ''[[Pleiotrichium]]'', Late Cretaceous, Germany (leaf)
* ''[[Pseudoctenis]]'', Late Permian to Late Cretaceous, worldwide (leaf form genus)
* ''[[Sarmatiella]]'', Late Triassic, Ukraine 
* ''[[Stangerites]]'', Late Triassic to Early Jurassic, Virginia and Mexico (leaf form genus)
* ''[[Sueria]]'', Early Cretaceous, Argentina (leaf)
* ''[[Taeniopteris]]'', Carboniferous to Cretaceous, worldwide (polyphyletic leaf form genus, also includes bennettitales and [[Marattiales|marattialean]] ferns)