Rugueux coloniaux mésodévoniens du Fondry des Chiens à Nismes (Ardenne, Belgique)

The stromatoporoid reef limestone that outcrops in the Fondry des Chiens at Nismes, reaches a thickness of 70 metres and is assigned to the base of the Givetian, by conodonts. It contains rare colonies of Nemphyma dalcqae n. sp. and Fasciphyllum katranicum (GORIANOV, 1968). F. conglomeratum (SCHLÜTER, 1881), type species of Fasciphyllum SCHLÜTER, 1885 has been collected from the Upper Eifelian and the Lower Givetian of Wellin. The relations between the genera Fasciphyllum and Battersbyia MILNE-EDWARDS & HAIME, 1851 are also investigated.