The Mikulak were a race native to the Alpha Quadrant. They are notable for their dark, leathery-skinned appearance.
A Mikulak competed in an interplanetary gymnastics meet at the University of Mississippi on Earth in 2245. (DS9 - The Lives of Dax short story: "Old Souls")
In 2366, it was hoped Mikulak tissue samples could be used to find a cure for Correllium fever. (TNG episode: "Hollow Pursuits")
A Mikulak competed in the 2376 Starfleet Academy Marathon on Danula II. She had dark, leathery skin and was telepathic. (ST - New Worlds, New Civilizations short story: "The Footfalls of Tradition")