Shuichengoxylon S.-J.Wang, X.-Y.He & L.-Y.Shao, 2011 genus doubtful

Sinocycadoxylon W.Zhang & X.-J.Yang, 2012 genus doubtful

Schozachia B.Rozynek, 2008 genus doubtful

Cycadaceae family accepted

Encephalartites V.A.Vahrameev, 1962 genus accepted

Pteronilssonia D.D.Pant & B.Mehra, 1963 genus accepted

Ctenis Lindley & W.Hutton, 1834 genus accepted

Zamiphyllum R.Caspary & Klebs, 1907 genus accepted

Zamiopteris J.Schmalhausen, 1879 genus accepted

Zamiophyllum A.G.Nathorst, 1890 genus accepted

Lunzia F.Krasser, 1916 genus accepted

Carpolithites genus doubtful

Yixianophyllum S.-L.Zheng, N.Li, Y.Li, W.Zhang & X.F.Bian, 2005 genus doubtful

Yavorskyia G.P.Radczenko, 1936 genus doubtful

Sewardioxylon K.M.Gupta, 1971 genus accepted

Sewardia R.Zeiller, 1900 genus accepted

Pseudoptilophyllum F.Krasser, 1918 genus accepted

Pseudopterophyllum R.Florin, 1933 genus accepted

Echinostipes Pomel, 1849 genus accepted

Semionogyna V.A.Krassilov & E.V.Bugdaeva, 1988 genus doubtful

Semionandra V.A.Krassilov & E.V.Bugdaeva, 1988 genus doubtful

Acozamites M.D.Zalessky, 1936 genus accepted

Lioxylon W.Zhang, Y.Wang, K.Saiki, N.Li & S.Zheng, 2006 genus doubtful

Aricycas S.R.Ash, 1991 genus accepted

Pseudodioon B.Erdei, F.Akgün & M.R.B.Lumaga, 2010 genus doubtful

Pseudocycas Nathorst, 1907 genus accepted

Pseudocycadeoidea N.K.N.Aiyengar & K.Jacob, 1953 genus accepted

Vladiloxylon A.Lutz, A.Crisafulli & R.Herbst, 2003 genus doubtful

Ontheodendron B.Sahni & A.R.Rao, 1933 genus accepted

Archaeocycas S.H.Mamay, 1973 genus accepted

Fricia Velenovský, 1855 genus accepted

Microzamia A.E.Reuss, 1846 genus doubtful

Butefia Dobruskina, 1964 genus accepted

Bureja V.D.Prynada, 1956 genus accepted

Scalaroxylon D.Vogellehner, 1967 genus doubtful

Leptopterophyllum H.H.Thomas, 1930 genus accepted

Bucklandiopsis G.Roselt, 1960 genus accepted

Sarmatiella V.D.Prynada, 1956 genus accepted

Michelilloa S.Archangelsky & D.W.Brett, 1963 genus accepted

Sanchucycas H.Nishida, M.Nishida & K.Tanaka, 1991 genus doubtful

Sueria C.A.Menéndez, 1965 genus accepted

Pecopteromedullosa J.P.Lotsy, 1909 genus accepted

Dioonopsis J.Horiuchi & T.Kimura, 1987 genus doubtful

Dioonitocarpidium H.Rühle von Lilienstern, 1928 genus accepted

Anthrophyopsis A.G.Nathorst, 1878 genus accepted

Antherangiopsis Nathorst, 1902 genus accepted

Antarcticycas E.L.Smoot, T.N.Taylor & T.Delevoryas, 1985 genus doubtful

Novoguineoxylon Boureau & Jongmans, 1955 genus accepted

Mesosingeria S.Archangelsky, 1963 genus accepted

Cladophlebidium H.C.Sze, 1931 genus accepted

Nilssoniaceae family accepted

Bolbopodium G.Saporta, 1874 genus accepted

Angaropteris V.A.Chachlov & A.A.Pollack, 1935 genus accepted

Primocycas J.-N.Zhu & X.-M.Du, 1981 genus doubtful

Androcycas J.Watson & S.R.Ash, 2006 genus doubtful

Blastolepis A.de Zigno, 1885 genus accepted

Pramelreuthia F.Krasser, 1916 genus accepted

Bjuvia R.Florin, 1933 genus accepted

Nikania V.D.Prynada, 1956 genus accepted

Nidia M.N.Bose & S.C.Srivastava, 1973 genus accepted

Neuropteromedullosa J.P.Lotsy, 1909 genus accepted

Heilungia V.D.Prynada, 1956 genus accepted

Rhiptozamites J.Schmalhausen, 1879 genus accepted

Rhipidopsis J.Schmalhausen, 1879 genus accepted

Amuriella V.D.Prynada, 1956 genus accepted

Hauffia Endlicher, 1842 genus doubtful

Hastystrobus J.H.A.van Konijnenburg-van Cittert, 1971 genus doubtful

Deltolepis T.M.Harris, 1942 genus accepted

Bennettitacearum Gothan, 1914 genus doubtful

Delemaya S.D.Klavins, E.L.Taylor, M.Krings & T.N.Taylor, 2003 genus doubtful

Mediocycas N.Li, X.-P.Fu, W.Zhang, S.-L.Zheng & Y.Cao, 2005 genus doubtful

Behuninia M.E.J.Chandler, 1966 genus accepted

Dirhopalostachyaceae family synonym

Keraiaphyllum K.Frentzen, 1932 genus accepted

Poecilitocaulon P.Fliche, 1910 genus accepted

Charmorgia S.R.Ash, 1985 genus doubtful

Triadostrobus W.Bock, 1969 genus accepted

Paracycas T.M.Harris, 1964 genus accepted

Haitingeria F.Krasser, 1916 genus accepted

Raumeria Göppert, 1853 genus accepted

Plicarizamites W.Bock, 1969 genus accepted

Almargemia Florin, 1933 genus accepted

Jurastrobus X.Wang, J.-H.Cui & J.-Z.Cui, 2006 genus doubtful

Gymnovulites V.B.Shukla, 1948 genus doubtful

Baierella R.Potonié, 1933 genus accepted

Quervainia T.M.Harris, 1932 genus accepted

Pleiotrichium Weyland & Greifeld, 1953 genus accepted

Guramsania V.A.Vachrameev, E.L.Lebedev & Z.Sodov, 1986 genus doubtful

Jensensispermum M.E.J.Chandler, 1966 genus accepted

Jeanpaulia F.J.A.N.Unger, 1845 genus accepted

Guilliera L.Crié, 1885 genus accepted

Cylindropodium Saporta, 1874 genus accepted

Cyclozamia Pomel, 1849 genus accepted

Macrotorellia A.N.Kristofovic, 1927 genus accepted

Sobernheimia J.H.F.Kerp, 1983 genus doubtful

Palaeozamia Endlicher, 1836 genus doubtful

Cycadorachis G.Saporta, 1873 genus accepted

Cycadophytites A.R.Rao & M.N.Bose, 1959 genus doubtful

Cycadophyllum J.G.Bornemann, 1856 genus accepted

Cycadocaulum K.Frentzen, 1932 genus accepted

Cycadium A.Guillard, 1839 genus accepted

Cycadinorachis B.D.Sharma, 1973 genus doubtful

Cycadeorachis M.Stopes, 1915 genus doubtful

Cycadeomyelon Saporta, 1875 genus accepted

Cycadeoidella Y.Ogura, 1930 genus accepted

Cycadeocarpus Dawson, 1873 genus accepted

Cycadenia W.Bock, 1969 genus accepted

Cycadella Ward, 1900 genus accepted

Cycadangium Ogura, 1932 genus accepted

Plagiozamiopsis H.C.Sze, 1943 genus accepted

Nagatocladus T.Ohana, T.Kimura, F.Takahashi & G.Naito, 1996 genus doubtful

Sinoctenis H.C.Sze, 1931 genus accepted

Palaeocycas Florin, 1933 genus accepted

Enygmatostrobus A.N.Kristofovic, 1915 genus accepted

Ptychoxylon B.Renault, 1889 genus accepted

Microcycadaceae family synonym

Stangeriaceae family accepted

Cycadopteris A.Zigno, 1853 genus accepted

Withamia Seward, 1895 genus synonym

Taeniopteris A.T.Brongniart, 1828 genus accepted

Dioaceae family synonym

Encephalartaceae family synonym

Boweniaceae family synonym

Stangerites Oldham & Morris, 1863 genus doubtful

Skyttegaardia E.M.Friis, P.R.Crane & K.R.Pedersen, 2021 genus doubtful

Iratinia R.Spiekermann, A.Jasper, A.M.Siegloch, M.Guerra-Sommer & D.Uhl, 2021 genus doubtful

Morrisia M.N.Bose, 1959 genus accepted

Osmundites Jaeger, 1827 genus doubtful

Ptilophyllum J.Morris, 1840 genus accepted

Colymbetes M.Stopes, 1915 genus accepted

Aldania V.A.Samylina, 1956 genus doubtful

Harringtonia J.Frenguelli, 1942 genus accepted

Sardoa F.Krasser, 1920 genus accepted

Clathropodium Saporta, 1874 genus accepted

Cloughtonia T.G.Halle, 1911 genus accepted

Tetoria T.Kimura & S.Sekido, 1974 genus doubtful

Schizopodium M.Morière, 1887 genus accepted

Calamopsis Heer, 1859 genus accepted

Zamiaceae family accepted

Zamia biserrulata D.W.Stev. & Sabato species synonym

Encephalartos powysorum Beentje species synonym

Phyllopteroides L.M.Medwell, 1954 genus accepted

Cycadites Sternberg, 1825 genus accepted

Eucommiidites Erdtman, 1948 genus doubtful

Crossozamiaceae family accepted

Cavamonocolpites de Lima, 1989 genus accepted

Beaniaceae family accepted