Coridanite

The Coridanites, or Coridans, are a humanoid race native to the dilithium-rich planet, Coridan III, which is located at the edge of Federation space, near the Romulan Star Empire.

In 2155, the Coridanites were poised to join the Coalition of Planets along with Earth, Vulcan, Andoria and Tellar, but a Romulan attack which caused massive damage to the surface of Coridan, forced them to withdraw from the talks. The Coridanites were semi-independant for over a century, before making moves towards being admitted into the United Federation of Planets in 2267. (ENT novel: The Good That Men Do; TOS episode: "Journey to Babel").