Some articles on manussan:

Mara (Doctor Who)
... created on the planet Manussa in the Scrampus system, turning the Manussan empire into the Sumaran empire ... Eventually the Mara was defeated and driven out by a Manussan (the ancestor of the future Manussan Federator) and cast into the "dark places beyond" ... Using Tegan and a young Manussan named Lon, the Mara tried to obtain the "great crystal" with which it hoped to restore its corporeal existence ...