In paleontology, said of representative, closely related species or genera of fossil organisms occurring in homotaxial formations of different faunal provinces.Of or belonging to a vicar or substitute; deputed; delegated: as, vicarious power or authority.Acting for or officially representing another: as, a vicarious agent or officer.Performed or suffered for another.In physiology, substitutive: noting the performance by one organ of the functions normally belonging to another; compensatory.