  A new realization for radiative neutrino mass generation is presented. Based
on the requirement of tree-level custodial symmetry and the introduction of
higher (greater than two) dimensional representations for scalar fields, a
specific scenario with a scalar septet is presented that generates neutrino
Majorana masses radiatively. This is accomplished through an eleven dimensional
operator that requires the addition of several scalar fields and a SU(2) 5-plet
of new fermions, together with a Z2 that guarantees the preservation of
custodial symmetry. The phenomenology of the setup is rather rich and includes
a dark matter candidate
