Classification of the family Cycadaceae

Fm. Cycadaceae Persoon 1807
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G. †Beaniopsis Ganju 1947
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G. †Ctenophyllum Schimper 1870
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†Ctenophyllum angustifolium Fontaine 1896
†Ctenophyllum braunianum Göppert 1844
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Invalid names: Pterophyllum decussatum Emmons 1856 [synonym], Pterophyllum spatulatum Emmons 1857 [synonym], Pterozamites abbreviatus Braun 1843 [synonym], Pterozamites obtusifolius Rogers 1843 [synonym]
†Ctenophyllum densifolium Fontaine 1896
†Ctenophyllum giganteum Fontaine 1883
†Ctenophyllum grandifolium Fontaine 1883
†Ctenophyllum latifolium Fontaine 1889
†Ctenophyllum lineare Emmons 1857
†Ctenophyllum pachynerve Fontaine 1905
†Ctenophyllum robustum Emmons 1857
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Invalid names: Ctenophyllum emmonsi Fontaine 1883 [synonym]
†Ctenophyllum taxinum Lindley and Hutton 1835
†Ctenophyllum truncatum Fontaine 1883
†Ctenophyllum wannerianum Fontaine 1900
†Ctenophyllum wardii Fontaine 1896
G. †Ctenopsis Berry 1911
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†Ctenopsis latifolia Fontaine 1889
G. †Cycadinocarpus Schimper 1870
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†Cycadinocarpus chapini Newberry 1888
†Cycadinocarpus circularis Newberry 1895
†Cycadinocarpus rajamahalensis Feistmantel 1877
G. †Cycadites Buckland 1836
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†Cycadites acutus Emmons 1856
†Cycadites cutchensis Feistmantel 1876
†Cycadites megalophyllus Buckland 1836
†Cycadites pungens Lesquereux 1891
†Cycadites rajmahalensis Oldham 1863
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Invalid names: Cycadites blanfordianus Oldham 1863 [synonym], Cycadites conferta Morris 1863 [synonym]
†Cycadites tenuinervis Fontaine 1883
†Cycadites unjiga Dawson 1882
†Cycadites wadianus Bose et al. 1983
G. †Cycadospadix Schimper 1870
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G. Cycas Linnaeus 1753
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†Cycas fujiiana Yokoyama 1911
G. †Dichotozamites Berry 1911
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†Dichotozamites cycadopsis Fontaine 1889
G. †Dioonites Miquel 1851
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†Dioonites borealis Dawson 1882
†Dioonites buchianus Ettingshausen 1852
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Invalid names: Pterophyllum abietinum Göppert 1816 [synonym]
†Dioonites carnallianus Göppert 1843
†Dioonites columbianus Dawson 1873
†Dioonites dunkerianus Göppert 1843
†Dioonites feneonis Brongniart 1828
G. †Encephalartopsis Fontaine 1889
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†Encephalartopsis nervosa Fontaine 1889
G. Encephalartos Lehmann 1834 [bread tree]
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†Encephalartos cretaceus Lesquereux 1891
G. †Glossozamites Schimper 1870
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†Glossozamites distans Fontaine 1889
G. †Leprospermum Heer 1877
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G. †Leptocycas Delevoryas and Hope 1971
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†Leptocycas gracilis Delevoryas and Hope 1971
G. †Menucoa Petriella 1969
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†Menucoa cazaui Petriella 1969
G. †Microzamia Corda 1846
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†Microzamia dubia Berry 1905
†Microzamia gibba Reuss 1844
G. †Platypterygium Feistmantel 1886
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†Platypterygium densinerve Fontaine 1889
†Platypterygium rogersianum Fontaine 1889
G. †Sphenozamites Brongniart 1849
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†Sphenozamites beani Lindley and Hutton 1832
†Sphenozamites oblanceolatus Penhallow 1902
†Sphenozamites rogersianus Fontaine 1883
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Invalid names: Calamites punctatus Emmons 1857 [synonym]
G. †Zamiopsis Fontaine 1889
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†Zamiopsis dentata Fontaine 1889
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Invalid names: Zamiopsis longipennis Fontaine 1889 [synonym], Zamiopsis pinnatifida Fontaine 1889 [synonym]
†Zamiopsis laciniata Fontaine 1889
†Zamiopsis petiolata Fontaine 1889
G. †Zamiostrobus Endlicher 1836
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†Zamiostrobus macrocephalus Endlicher 1836
†Zamiostrobus virginiensis Fontaine 1883