It is assumed that their history began about 250 million years ago in the Early Triassic, if we talk about all crocodilomorphs.
Kucatshangwa ukuthi umlando wabo waqala cishe eminyakeni eyizigidi ezingama-250 edlule ku-Triassic yokuqala, uma sikhuluma ngazo zonke i-crocodilomorphs.