The original and traditional Molas made by the Cuna Indians of Panama are sometimes, but not always, adorned with some embroidery, usually the most basic stitches.
My friend Julie of My Quilt Diary has an original Mola panel and says the Chain Stitches on it are so tiny there are eight stitches on a cm.
I have also used some of the basic stitches - Running, Chain, Fly and Herringbone.
Instead of a single strand of cotton floss, though, I used perle #8 and made bolder stitches.
Mola - Snippets of Interest
The word Mola originally means bird plumage.
(Source: Sandals Islands official website)