Akaali

From Memory Alpha, the free Star Trek reference

The Akaali was a pre-industrial civilization that the Enterprise NX-01 encountered in 2151, inhabiting a Class M planet. Another race, known as the Malurians, were exploiting their planet without their knowledge. The use of Tetracyanate 622 caused many of the Akaali to suffer from a serious disease.

Riann was a member of this species. (ENT: "Civilization")