A new Late Famennian lungfish from New South Wales, Australia, and its bearing on Australian-Asian terrane relations

A new genus and species of lungfish with toothplates, Adelargo schultzei, i s described from the Hunter Siltstone (Devonian;Late Famennian) near Grenfe ll, New South Wales.;Materials assigned to Adelargo schultzei gen. et sp. n ov., include a portion of the left side of the skull comprising B, I (postp arietal) and J (parietal) bones, pterygoid and prearticular toothplates, a parasphenoid with a long posterior stalk, vertebrae, ribs, anal fin support s and scales. Toothplates are similar to Dipterus, although morphology of t he skull, parasphenoid and postcranial elements is more derived. Biogeograp hic relationships of the Grenfell fauna were based on the presence of the a ntiarch group Sinolepidoidei, also present on Asian terranes during the Lat e Devonian. A small number of lungfish scales have been described from Asia n sinolepid localities of this age, bur differ from those of Adelargo schul tzei, and other faunal similarities between these areas appear limited. Pau city of eastern Australian Devonian taxa on the North and South China block s implies that strong biogeographic relationships between eastern Australia and Euramerican localities during the Late Devonian were not the result of Asian migration routes, but the closer proximity of these areas.