archaeocete

— Our estimates further show that the most recent common ancestor of extant Osedax appeared during the Late Cretaceous (ca. 74.8 Ma), indicating that the radiation of Osedax would be concomitant with the occurrence of large marine reptiles and teleost fishes in the oceans [56, 57 ] rather than with the origin and radiation of large archaeocete cetaceans during the Eocene (ca. 50 Ma; [58 ]).