The dominant or “Super” is a form of a co-dominant gene, and can be bred to a normal animal to produce entire clutches of the visible het, or co-dominant form. There is a noted difference between the visible het/co-dominant form and the homozygous super form. When we do not see a visible difference between the het and homozygous forms, they are referred to as dominant as opposed to co-dominant.
I am not sure why, but Spider ball pythons, and Pinstripe ball pythons fall into this category, even though their super form does not exist. The super form of these snakes die shortly after fertilization of the egg. (The super Woma, or Pearl, is considered co-dominant because they can live to hatch, even though they don’t survive long thereafter due to weak motor skills.)