I think my id could be correct, cant find information about these bettles being im Australia though. Was found under a log i was moving for firewood, i thought i had killed it or hurt it so i put it in my terrarium. Seems very alive now but i want to know if it is a pest or not before release it
On closer inspection, this is not an animal but a used case. Think the spotted gum keep psyllid observation is correct.