2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101158In this article we give necessary and sufficient conditions providing regularity of solutions to stochastic Volterra equations with infinite delay on a $d$-dimensional torus. The harmonic analysis techniques and stochastic integration in function spaces are used. The work applies to both the stochastic heat and wave equations.10 pages, corected and revised version. Proc. AMS (in print)ProbabilityOptimization and Control60H20; 60H05text