| genus |
Arthrozamia Rchb., 1828 |
doubtful |
| genus |
Ceratozamites L.Meschinelli, 1889 |
doubtful |
| genus |
Cretocycas M.Nishida, A.Yoshida & H.Nishida, 1996 |
doubtful |
| genus |
Cycadostrobilus J.N.Zhu, 1994 |
doubtful |
| genus |
Cycas L. |
accepted |
| genus |
Encephallartes Endl., 1842 |
doubtful |
| genus |
Eostangeria M.Barthel, 1976 |
doubtful |
| genus |
Eury-Cycadolepis (A.C.Seward) A.C.Seward, 1917 |
doubtful |
| genus |
Fascisvarioxylon K.P.Jain, 1964 |
doubtful |
| genus |
Fittonites Kuntze, 1903 |
doubtful |
| genus |
Katakidozamia J.N.Haage & E.Schmidt ex Regel, 1876 |
doubtful |
| genus |
Leprospermum O.Heer, 1877 |
doubtful |
| genus |
Menucoa B.Petriella, 1970 |
accepted |
| genus |
Stanggeria Stevens, 1854 |
doubtful |
| genus |
Todda-Pana Adanson, 1763 |
doubtful |
| genus |
Triassiflorites W.Bock, 1969 |
doubtful |
| genus |
Zamioidea J.Schuster, 1931 |
doubtful |
