Silika
this species of aliens was made of living stone, and was distinguished by their craggy faces and wide mouths. They were humanoid in shape, but had a third arm protruding from the center of their chests. To other species, individuals were indistinguishable. The Silika had many deep-rooted traditions, including using the same initials for children in a specific family unit, which seemed inane but were nonetheless treated with the utmost respect.