I've collected about 15 adult pleasing fungus beetles (not sure what species as of yet) and was wondering if anyone has had success breeding them on anything but shelf fungi (such as commonly available store-bought mushrooms as a substitute.)
The species I have is Megalodacne fasciata; I put some weird mushrooms I bought as a gag a few months ago in with them and they don't seem to be paying much attention to them; I'll probably head over to the store again and pick up some shelf-fungi looking ones.
I may be wrong, but I suspect your hike through the produce section at the grocery store will fail to yield a suitable fungus. A hike through a local park should prove more fruitful.
Well, I've found some weird 'shrooms at the local Chinese store (they're quite tasty actually lol) and the beetles seem to be nibbling on them; hopefully I'll have babies soon!