Australian Triassic lungfish skulls

Skull bones ofGosfordia truncataWoodward, 1891, from the Lower Triassic Hawkesbury Sandstone of New South Wales, Australia, are described for the first time. The skull roofing pattern suggests possible affinities betweenG. truncataandParaceratodus germaini(Triassic, southwest Madagascar). A three-dimensional reconstruction of the skull ofCeratodus formosusWade, 1935, based on the holotype, found in a Lower Triassic deposit at Brookvale in New South Wales, is included. This reconstruction indicates that this species is not closely related either to the recent Australian lungfish,Neoceratodus forsteri, or to the TriassicCeratodus(Tellerodus)sturiifrom Nord Alpen in Austria, and it has no close affinities withG. truncata.A new genus,Ariguna, is therefore proposed to receiveCeratodus formosusWade, 1935. Without associated tooth plate material,G. truncataandA. formosacannot be defined more precisely.