The Solturians were the humanoid inhabitants of the planet Solturis. (COMIC: The Penta Ray Factor)
The Solturian News Agency was in contact with humanity during the attempted Dalek invasion of Solturis. (COMIC: The Penta Ray Factor, PROSE: Peaceful Thals Ambushed!)
Solturian food was known in other parts of the universe. Menlove Stokes drank Solturian scotch. (PROSE: The Well-Mannered War) Taal described the chieftain of the Sprox as having "breath as rank as the whiff from a bowl of Solturian bog-broth." (PROSE: Zamper)