  We propose a dynamical scoto-seesaw mechanism using a gauged $B-L$ symmetry.
Dark matter is reconciled with neutrino mass generation, in such a way that the
atmospheric scale arises \textit{a la seesaw}, while the solar scale is
\textit{scotogenic}, arising radiatively from the exchange of ``dark'' states.
This way we ``explain'' the solar-to-atmospheric scale ratio. The TeV-scale
seesaw mediator and the two dark fermions carry different $B-L$ charges. Dark
matter stability follows from the residual matter parity that survives $B-L$
breaking. Besides having collider tests, the model implies sizeable charged
lepton flavour violating (cLFV) phenomena, including Goldstone boson emission
processes.
