Aenar

The Aenar were a sub-species of the Andorian race. 

History
The Aenar were long considered a myth by the Andorians until they were discovered in 2104 after which official diplomatic relations were maintained by both governments.

In 2154, the Aenar were dragged into interstellar politics when a member of their species was kidnapped by the Romulans and used to remote control a drone ship. 

In the mirror universe, Aenar officers served in the Terran Empire's Imperial Starfleet.

Destiny timeline
The species had become extinct as of the late 23rd century. After the Borg Invasion of 2381, the remains of a very large Aenar city was located by Andorian scientists. 

Online timeline
Some Aenar officers served in Starfleet by 2409.