The Calentar (known to the Borg as Species 1137) were a race native to the Delta Quadrant, possibly native to Calentar.
The Calentar were one of many species located aboard the Nyrian biosphere vessel that USS Voyager encountered in 2373. (VOY episode: "Displaced")
In an alternate timeline, Annika Hansen had a memory of assimilating a member of the Calentar. (ST - Myriad Universes novel: Places of Exile)