Prophaethon is an extinct genus of seabird that lived during the Early Eocene. It is essentially known from fairly comprehensive remains of a single individual, namely skull and some limb bones, which were recovered from the London Clay on the Isle of Sheppey, England. Some more indeterminable remains from the Late Paleocene of Maryland, US might also belong here. Thus, the genus contains only a single species, Prophaethon shrubsolei. As indicated by its name, it is a distant relative of the tropicbirds.
- Family Prophaethontidae Harrison Walker 1976 Genus Prophaethon Andrews 1899 Prophaethon shrubsolei Andrews 1899 Genus Lithoptila Bourdon, Bouya
- Prionotus Prionotus evolans or unidentified related form Propebela Prophaethon tentative report Protocardia Pseudacris Pseudacris triseriata Pseudoliva
- Propebela marylandica type locality for species Propebela parva Prophaethon tentative report Prosthennops Prosthennops niobrarensis Prosthennops
- Early Eocene of Ouled Abdoun Basin, Morocco including Abdounornis Prophaethon shrubsolei Andrews 1899 Late Paleocene ? Early Eocene Phaethontidae