Rauisuchids occurred throughout much of the Triassic, and may have first occurred in the Early Triassic if some archosaurian taxa such as Scythosuchus and Tsylmosuchus are considered to be within the family.
Throughout most of the Triassic period, rauisuchids existed; they might have first appeared in the Early Triassic if taxa such as Scythosuchus and Tsylmosuchus are considered part of their family.