I know they are often referred to as Homo superior in the comics, although I personally find it much easier to believe in eyeballs that shoot force blasts than the idea of any international body of (presumably mostly non-mutant) taxonomists agreeing to that particular designation, formal rules of nomenclature notwithstanding. Elsewhere they are referred to as a “genetic offshoot” or “subspecies” of humanity.
But if such a pattern of traits were to really occur among humanity, how would they be classified? Seemingly normal parents produce mutant offspring; mutant parents produce (mostly) mutant offspring (but not always); the traits of mutant offspring need not resemble the parent’s traits in any way. Would this pattern really warrant a separate taxonomic classification? Or would it be regarded as more closely analagous to some type of heritable disease?