Abstract
The ovulate cone Microzamia gibba (A.E. Reuss) Corda, from the Bohemian Cenomanian (Czech Republic, Central Europe) is described. The genus Microzamia Corda is newly emended and compared with the fossil genera Beania Carruthers, Zamiostrobus Endlicher and the extant genera Zamia L., Chigua Stevenson, Macrozamia Miquel, Ceratozamia Brongniart and Encephalartos Lehmann. The genus Cycadeostrobus Carruthers might be synonymous with Microzamia. The typification of Microzamia gibba is discussed resulting in the designation of a neotype. It is demonstrated that the stony layers of Beania gracilis and M. gibba have a similar anatomy. A reconstruction of the ovulate cone M. gibba is proposed, showing large cataphylls on the cone peduncle. The ovulate cones occur in association with the leaves Jirusia jirusii (Bayer) Domin.
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