It turns out that fungus growing termites sometimes cultivate Termitomyces titanicus. This is an excellent scientific name.

CORRECTION:
I assumed they had to work like ants. Wrong! (A fruiting body would only emerge from a dead ant colony not so with these termites) Something about macrotermitinaes nuptial flights stimulates mushroom fruiting. (!) They get covered in pink spores.

And you can eat it!

Hence the species name.

The fungi farmed by ants (Leucoagaricus gongylophorus) also produces mushrooms when their colonies die out. This fungi can't survive without the ants and the ants propagate it by carrying it with them when they found new nests:

So what is the purpose of the mushrooms?

Is it just a hold-over from the days before the fungi was dependent on ants?

I've been trying to find out if you can eat the ones that grow on old ant nests.

https://sauropods.win/@futurebird/111311901058937024

@futurebird
Looks like you are trying to convert fungiphiles into ant enjoyers.
I think it might be working...