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Combining Characters of Pteridaceae and Tree Ferns: Pterisorus Radiata gen. et sp. nov., A Permineralized Lower Cretaceous Filicalean with Radial SoriDownload
An anatomically preserved leptosporangiate filicalean that combines characters of the Pteridaceae and tree ferns has been discovered in the Lower Cretaceous (Valanginian-Hauterivian boundary) Apple Bay flora on Vancouver Island, Canada. Exindusiate sori are radial, with numerous annulate...