Nezu

The Nezu were a humanoid species from the Delta Quadrant that have a ridge running down their face and horns above their eyes.

In 2373, USS Voyager encountered the Nezu after a Nezu colony was hit by a massive meteoroid strike. It was soon discovered by a Nezu physicist, Vatm, that the meteoroid strikes were actually an attack by the Etanians. Vatm was killed before he could reveal this, but his data made it's way to Voyager and was used to drive off the Etanians. 

Alternate timeline
In an alternate timeline, Chakotay sarcastically suggested staying with the Nezu as an alternative to the Vostigye. Later the Nezu were among several species that banded together to fight the Voth when they entered the Vostigye home system.