A new genus for the Dipnoan species Ceratodus tuberculatus Tabaste, 1963

A tooth plate of the large lungfish referred to Ceratodus tuberculatus Tabaste, 1963 from Kharga Oasis, Egypt, allows reconsideration of its generic status. Comparisons with fossil Ceratodus and living Neoceratodus demonstrate the generic distinction of this taxon and Retodus n. gen. is proposed for this large dipnoan. Tooth plates of R. tuberculatus n. comb. are characterised by four transverse ridges, broadly rounded crests, a reticular pattern of ridges and hollows, and large adult size. The stratigraphic time span for specimens assigned to R. tuberculatus n. comb. is Albian-Early Cretaceous of southern Algeria, to Campanian-Late Cretaceous of Dakhleh and Kharga Oases, Egypt, and Maastrichtian Late Cretaceous of Niger.