Abstract
33 species of Upper Cretaceous silicified bryozoansfound by A. Arnaud-Vanneau and H. Arnaud (Grenoble) within a crevice filled with residual clay, have been studied. Most of the species are known from the Senonian (Coniacian — Santonian) of the Anglo-Paris Basin. The faunal relations with the Upper Cretaceous Bryozoa of the Provence, of the Aquitain Basin or the Alpine regions (Austrian Alps) are less significant. Decurella? arnaudae nov. sp. and Onychocella subpalpigera nov. sp. are described.
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