The Shivolians (known to the Borg as Species 521) were a humanoid race native to the Delta Quadrant.
A female member of this species visited the USS Voyager when it was docked at a Markonian outpost in 2376. (VOY episode: "Survival Instinct")
In an alternate timeline, Annika Hansen had a memory of assimilating a Shivolian. (ST - Myriad Universes novel: Places of Exile)