It has recently been demonstrated that the specimens from Peru and Chile are actually attributable to the closely related S. oculatus and these two similar species are sympatric in the southwestern Atlantic off Argentina. The specific name capensis refers to the type locality, the Cape of Good Hope.
It has recently been demonstrated that the specimens from Peru and Chile are actually part of the same genus as S. oculatus, and these two similar species coexist in the southwestern Atlantic off Argentina.