Plicatodus jordani n.g., n.sp., a new xenacanthid shark from the Lower Permian of Europe (Saar-Nahe Basin, Germany). In ARSENAULT, M., LELIÈVRE, H. & JANVIER, P. (Eds.): VIIth International Symposium, Studies on Early Vertebrates, 9–22 June 1991, Miguasha Parc, Quebec.– Bulletin du Muséum National d'Histoire Naturelle Section C: Sciences de la Terre, 4e Série, 17(1–4): 209–226, 7 fig.