Araumycos
Araumycos seems to be less of a place and perhaps more of a spirit because it is described to be the great ancestor of the myconids.
Basidia said Araumycos would be a safe place for him to take the myconids fleeing the corruption of Zuggtmoi in Neverlight Grove.
Phylo spoke of a wedding which is possibly between Zachtmooi and Araumykos, but this is all unclear to the adventurers.