The Myleans were a Delta Quadrant species who occupied a region of space near Talax.
They had well-developed sweat glands, no taste buds, a fused spinal column, and were intolerant of bright light because of their dilated pupils. While they were not known to share a common ancestry with Talaxians, the two species occasionally interbred.
Neelix's great-grandfather was Mylean. His Mylean genes became hyper-stimulated due to a Srivani medical experiment in 2374. (VOY: "Scientific Method")