quantum spin

I ran acorss this in a wikipedia article As far as I am aware there are ~16 fundimatl particles predicted by the standard modle so I can't work out where this five spins claim come from. Does anyone know where this may be comeing from?

What is quantum spin? Ok, I know this has been asked before. I have seen several physicists claim that it is a pure quantum concept and that it is just accident that it was named spin. An earlier discussion on this board confirmed my suspicion that this cannot be correct because it is a measure...