I don’t really see where you are going with this. Yes, all the members of a species could qualify as being a “population”—expecially if they all lived in the same place.
However, that doesn’t make species selection into a special case of group selection under the Wikipedia definition.
If you define a species as the set of all such organisms, then a “population” is a subset of that set.
And a set is a subset of itself.
I don’t really see where you are going with this. Yes, all the members of a species could qualify as being a “population”—expecially if they all lived in the same place.
However, that doesn’t make species selection into a special case of group selection under the Wikipedia definition.