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We consider renormalizable SO(10) Yukawa interactions and put the threefermionic 16-plets into the 3-dimensional irreducible A_4 representation.Scanning the possible A_4 representation assignments to the scalars, we find aunique case which allows to accommodate the down-quark and charged-leptonmasses. Assuming type II seesaw dominance, we obtain a viable scenario with theZee-Wolfenstein neutrino mass matrix, i.e., the Majorana mass matrix with avanishing diagonal. Contributions from the charged-lepton mass matrix resolvethe well-known problems with lepton mixing arising from the vanishing diagonal.In our scenario, fermion masses and mixings are well reproduced for both normaland inverted neutrino mass spectra, and b-tau Yukawa unification and definitepredictions for the effective mass in neutrinoless double-beta decay areobtained.

Embedding the Zee-Wolfenstein neutrino mass matrix in an SO(10) x A4 GUT scenario