Civilization from the Malurian system, consisting of four billion people, that were wiped out in 2267
by the errant Earth space probe Nomad. The Malurians were being studied by a Federation science team under the direction of Dr. Manway at
TOS "The Changeling" ; Star Trek Encyclopedia II
The non-indigenous race who had covertly planted
themselves into the Akaali culture in order to mine for viridium. A very toxic substance known as Tetrasianite 622, which was used on
their drilling equipment, had contaminated the groundwater, causing sickness and death among the Akaali.
The Homeworld is Maluria.