A new genus for the Dipnoan species Ceratodus tuberculatus Tabaste, 1963 Author Churcher, Charles S. Department of Zoology, University of Toronto, 25 Harbord Street, Toronto, Ontario, M 5 S 3 G 5 (Canada) and Department of Palaeobiology, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario M 5 S 2 C 6 (Canada) rchurcher @ shaw. ca rchurcher@shaw.ca Author Iuliis, Gerardo De Faculty of Community Services and Health Sciences, George Brown College, 200 King Street East, Toronto, Ontario, M 5 A 1 J 5 (Canada) and Department of Zoology, University of Toronto, 25 Harbord Street, Toronto, Ontario, M 5 S 3 G 5 (Canada) gerry @ zoo. utoronto. ca Author Kleindienst, Maxine R. Department of Anthropology, University of Toronto at Mississauga, Ontario, L 5 L 1 C 6 (Canada) and Department of Egyptology, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario, M 5 S 2 C 6 (Canada) maxine. kleindienst @ utoronto. ca text Geodiversitas 2006 28 4 635 647 journal article 10.5281/zenodo.4650971 1638-9395 4650971 Genus Retodus n. gen. TYPE SPECIES . — Ceratodus tuberculatus Tabaste, 1963 . ETYMOLOGY. — From the Latin, rete , net; - odus , Latinised Greek -Óδούυς, toothlike, referring to a network of ridges on the occlusal surface of a tooth plate. DIAGNOSIS. — The same as Retodus tuberculatus n. comb. REMARKS The new lungfish tooth plate (ROM 47638) reported here preserves features unknown in the species previously known as Ceratodus tuberculatus and indicates that the species cannot be referred to an already described genus. Although insufficient material of the species is known to permit a phylogenetic analysis, it is apparent that it forms a distinct clade, and thus merits generic distinction as Retodus n. gen.