Peltoschema scaphula (Chapuis, 1877) is part of the 'orphana' species group and allied to P. suturalis, which along with this species is found on phylodinous Acacia. The dark mark along the suture extending through the pronotum is an entirely unique feature.
https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/11c64bee-672f-4358-9889-ddb0e2a9c898
Peltoschema scaphula is listed in the following regions:
Canberra & Southern Tablelands