A revision of Australian Mesozoic and Cenozoic lungfish of the family Neoceratodontidae (Osteichthyes:Dipnoi), with a description of four new species

The taxonomy of the predominantly Australian fossil dipnoan genus,Neoceratodus,is revised and the Recent Australian lungfish,Neoceratodus forsteri,and two fossil species,Neoceratodus eyrensisandNeoceratodus nargun,are redefined. Two new species of the related Tertiary genus,Mioceratodus,are described on the basis of tooth plates from central and northern localities in Australia. These areMioceratodus diaphorusandMioceratodus poastrus.A new genus,Archaeoceratodus,is erected to include three rare Tertiary species and one Mesozoic species. The Tertiary members of this genus are the type species,Archaeoceratodus djelleh,described originally asNeoceratodus djelleh,and two new species,Archaeoceratodus rowleyiandArchaeoceratodus theganus.The Mesozoic species isArchaeoceratodus avusfrom Triassic and Cretaceous deposits in southeastern Australia, described originally asCeratodus avus.All three genera belong in the family Neoceratodontidae.