Cycadeoidaceae is a family of bennettitalean plants which flourished in the Mesozoic era. Two genera, ''

Cycadeoidea ''Cycadeoidea'' is an extinct genus of bennettitalean plants known from the Jurassic and Cretaceous in North America, Europe and Asia. Taxonomy William Buckland originally gave the name to two species he described, ''C. megalophylla'' and ''C ...

'' and ''

Monanthesia ''Monanthesia'' is an extinct genus of bennettitalean plant that is known from fossil finds in Europe and North America, which existed during the Early Cretaceous The Early Cretaceous (geochronology, geochronological name) or the Lower Cretaceo ...

'', are currently recognised though most species are poorly known. They had a similar morphology to

cycads Cycads are seed plants that typically have a stout and woody (ligneous) trunk with a crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male or ...

, with thick, branchless trunks covered in scale leaves.

References

Bennettitales Jurassic plants Cretaceous plants Prehistoric plant families Jurassic first appearances Cretaceous extinctions {{cretaceous-plant-stub