Not only do ants provide schombo/mrymecos with protection but with nutrients as well ... as stated below by
Myrmecophila - Wikipedia, the free encyclopedia
"The ants associated with Myrmecophila tibicinis pack many of the pseudobulbs with debris that includes other dead ants, a variety of insects, pieces of plant material, seeds and sand. Myrmecophila tibicinis directly utilizes minerals of the organic debris ("garbage dumps") deposited by the ants inside the hollow pseudobulbs."
I guess I am echoing Weebl
Pertaining to article of Weebl's link .. their pseudobulbs are like little intestines ..
Now there's a thought
and visual