Upper Devonian ammonoids from the Manticoceras zone, Fitzroy Basin, Western Australia

Describes 15 species of early upper Devonian (Frasnian) ammonoids, of which 14 are new, belonging to nine genera (including Mesobeloceras n.g.), from the Sadler, Gogo, Virgin Hills, and Fossil Downs formations of the Fitzroy basin, Western Australia.