- "Variations of diplurans are found on almost all habitable worlds. It’s this particular species that is interesting. During various parts of its life cycle, it excretes a certain fluid rich with pheromones. These pheromones happen to be a powerful hallucinogen for some mammalian species. From what records survive, the hallucinations were terrifying."
- ―Natua Wan
Rhak-skuri, which translated from the ancient Sith as "Dream Singer", were a dark side twisted sub-species of Diplura native to the planet Upekzar. The insectoid Rhak-skuri excreted powerful pheromones that induced terrifying hallucinations in mammalian species.
- Fate of the Jedi: Ascension (First appearance)
- Fate of the Jedi: Apocalypse (as Dream Singer) (Mentioned only)