Which oxygen ion is present in a superoxide?

A superoxide contains the superoxide ion, which is represented by the chemical formula ${\text{O}}_2^{-}$.123

In this ion, the oxygen atoms possess oxygen-oxygen covalent bonds and carry a total charge of $-1$. This distinguishes them from peroxide ions (${\text{O}}_2^{2-}$), which have one additional negative charge, and oxide ions (${\text{O}}^{2-}$). In these compounds, the oxygen atoms have an oxidation number of $-1/2$.432