Representants des genres Phillipsastrea d'Orbigny, A., 1849, Billingsastrea Grabau, A.W., 1917 et Iowaphyllum Stumm E.C., 1949 du Frasnien du massif de la Vesdre et de la bordure orientale du bassin de Dinant

Thirteen species and subspecies of the genera Phillipsastrea D'Orbigny, A., 1849, Billingsastraea Grabau, A.W., 1917 and lowaphyllum Stumm, E.C., 1949, collected mainly from the Frasnian of the eastern part of Belgium, are described, figured and placed in their stratigraphic context. A new subspecies, Phillipsastrea ananas veserensis, is defined.