Specimens of the four recognised subspecies of Umbilia armeniaca A U. armeniaca armeniaca, trawled off Ceduna, Great Australian Bight, 90–120 m, 105 mm B U. armeniaca diprotodon, taken by diver, Thorny Passage, Port Lincoln, South Australia, 35 m, 102 mm C U. armeniaca clarksoni, taken by diver off Cape Le Grande, Esperance, Western Australia, 30–35 m, 94.1 mm D U. armeniaca andreyi, collected using ROV, off Augusta, Western Australia, 150 m, 84.2 mm and E U. armeniaca from the Lancelin population, collected using ROV, off Lancelin, Western Australia, 200 m, 68.9 mm.