Lotapareen

The Lotapareen were a species of tridactyly reptiles from the planet Lota in the Andromeda Galaxy.

Biology
Lotapareen were not humanoid in form. They had three legs arranged in a tripod, with a slim upright body and three arms. Their heads were oval shaped and they had saucer-like eyes and a stumpy snout. They also had lizard like skin, ranging in colour from grey, to turquoise, to acid yellow. Their third arm protruded from their chests; each arm ended in a hand with three fingers.

Both the Doctor and Donna met Mesanth, a member of the Cult of Shining Darkness during their visit to the Andromeda Galaxy.

History
The Lotapareen evolved from highly communal herbivorous ancestors. This meant that they hated violence and conflict. (NSA: Shining Darkness)