  We propose a new family structure for the Standard Model fermions, where the
muon is assigned to the third family, taking the placeholder from the tau
lepton. This reassignment, which is a mere choice of convention in the Standard
Model, becomes physically meaningful in the presence of new physics assuming a
direct link between quarks and leptons. In fact, when quark and leptons are
coupled by new interactions, the choice of which lepton is assigned to a
particular quark generation brings physical consequences, revealing potentially
meaningful patterns in the masses and mixings, while pointing to precise and
testable predictions for experiments.
