Cirripeds have a long fossil history stretching from the middle Cambrian to the present. The oldest known cirriped is Priscansermarinus barnetti from the Burgess Shale, a proposed relative of gooseneck barnacles. Another relative of the gooseneck barnacles from the fossil record is Cyprilepas holmi from the Silurian. Neither of these very old cirripeds had any kind of calcareous covering suggesting this feature common to most living cirripeds evolved after these time periods. When fossil cirripeds are found they are often individual plates broken from the rest of the animal or traces left where they were attached or burrowed.
Sources:
Collins, D. H. and D. M. Rudkin. 1981. Priscansermarinus barnetti, a probably lepadomorph barnacle from the Middle Cambrian Burgess Shale of British Columbia. J. Paleo. 55: 1006-1015.
Wills, L. J. 1963. Cyprilepas holmi, a pedunculate cirripede from the Upper Siluvian of Oesel, Estonia. Palaeontol. 6: 161-165.
