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We propose to relate dark matter stability to the possible Dirac nature ofneutrinos. The idea is illustrated in a simple scheme where small Diracneutrino masses arise from a type-I seesaw mechanism as a result of a $Z_4$discrete lepton number symmetry. The latter implies the existence of a viableWIMP dark matter candidate, whose stability arises from the same symmetry whichensures the Diracness of neutrinos. The symmetry groups $\Delta_{27}$ and $A_4$are then used to extract a rich variety of flavour predictions.

Dirac neutrinos, dark matter stability and flavour predictions from Lepton Quarticity