K'normian

The K'normians were a humanoid species that had been encountered by the Federation by the late 23rd century.

By the 2270s members of this species were serving in Starfleet. 

''In the alternate reality, the Federation had already encountered the K'normians by 2259. confiscated a K'normian trading ship during the Mudd Incident a month before using it to infiltrate Qo'noS.''

Background
The K'normians were designed by Fred Phillips and Robert Fletcher for The Motion Picture.

In an article appearing in the edition of Star Trek: The Magazine Volume 2, Issue 9, entitled "Who is that Alien?", the following information about the K'normians, as taken from Fletcher's original background notes, added:

"The K'normians were a mostly normal humanoid race, though they did have large foreheads not unlike the Klingons, which Fred Phillips also redesigned for The Motion Picture. The K'normians' large brains provided an eighth sense that gave them a superior appreciation of time and space."

K'normia (Psi Tauri) was the name of a star in the Alpha Quadrant. The primary was a Class F star. Magnitude of this star was +5, which was the same brightness as Sol. K'normia was the name of a planet in the system. too, and had, by 2378, become a member of the Federation. (Star Trek: Star Charts, United Federation of Planets I & III)

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