Half body vertical split

Nasnas

only half a body: one eye, one arm, one leg, and half a face or torso, split down the midline as though a whole person had been cut in two

Koerakoonlased

In the first they are divided vertically — one side of the body human and the other side dog, taking one half from each, with a single eye set in the centre of the forehead.

Shiqq

The Shiqq is described as literally half a creature: a body split down the vertical midline, leaving it with a single eye, a single arm, and a single leg, and it is said to move by hopping on its one leg.