I am more specifically looking for references with illustrations of fossil "Sabellaria" (I am well aware of the Miocene ones ... I would like to have access to reports with older occurrences, if any).
Bellan, G. (2001). Polychaeta, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels. 50: 214-231.