This study used measurements and observations on the burrows of extant species of Dodecaceria fimbriata and D. concharum to identify their possible fossil burrows. The extant burrows were from marine littoral shale and the calcareous alga Lithothamnion. From published records unequivocal fossil burrows were not found for these two species. Trace fossils of D. fimbriata appear to have been present in the Miocene and Dodecaceria cretacea (probably not Dodecaceria) in the Cretaceous. The conclusion is that D. fimbriata and D. concharum separated from a common ancestor in the late Cretaceous.