Looking at Bold Systems 4 there is a good coverage of both named and un-named Prionocris species. However there is a high degree of variation in the wing pattern within and between species groupings. This specimen is apparently more boldly marked than any I see on Bold Systems, much more so than the plainer 4539658, P. complanula is the most strongly represented species there with a distribution centred on SE Queensland. Therefore I think it would be best to ID these as Prionocris (genus) for now.