This is a Mulberry Shell, formerly known as Morula marginalba but the genus name keeps changing to Tenguella and now Arakawania according to iNaturalis.
Thanks Jenny. I've updated the name to Tenguella marginalba, to match ALA, with Morula marginalba as a synonym. https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/1d5b19d5-0e1c-4690-9cb7-661fa3074ae7