Yuggoth

Yuggoth was the original homeworld of the fungoid species popularly known as the Darklings. Following their war with the Tzun, the Darklings were driven to 61 Cygni. (PROSE: First Frontier)

Behind the scenes

 * Yuggoth in H. P. Lovecraft's fiction was an outer planet of the Sol system implied to be Pluto. It was used as an outpost for the, multiple related species of light-averse fungus-like creatures.