Anatomical study of a sample of silicified wood collected from a fluviolacustrine sand of Wealden age at the classic locality of Feron-Glageon has yielded a new species described as Dadoxylon arduennense. This species, with abundant transverse parenchyma, raises the problem of the affinities of wood with septate tracheids known from the Jurassic and Cretaceous. It is suggested that this wood may have affinity for the group of angiosperm precursors to which belong the Caytoniales, also represented (by leaf imprints and reproductive structures) in the Feron-Glageon Wealden locality.

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