Les Gypidulinae des niveaux recifaux du Frasnien de Frasnes et de Boussu-en-Fagne

The author revises the gypidulinids of the Frasnian reefs of Frasnes and Boussu-en-Fagne. He establishes Metabolipa n. gen., Neometabolipa n. gen. and Pbysemella n. gen. as well as the species Neometabolipa delhayei n. sp., N. duponti n. sp. and Pbysemella maillieuxi n. sp. He redescribes the species Pentamerus Greindli MAILLIEUX, E., 1909 and P. Broecki MAILLIEUX, E., 1909 respectively assigned to the genera Metabolipa and Neometabolipa. He recognizes in each reef a characteristic association of genera and species.