Original sentence: Primodroma, a fossil from the Early Eocene London Clay of England, may belong to the Hydrobatidae (perhaps specifically to the Oceanitinae) or maybe the Diomedeoididae.There are a total of around 125 species of Procellariiformes worldwide, divided among four living and one prehistorically extinct family:
Edited sentence: A few rather fragmentary Late Cretaceous and Paleogene fossils have been occasionally allied with or even placed in the Procellariiformes.As regards Lonchodytes (or rather its type species L.Eopuffinus and Manu on the other hand are more likely members of the Procellariiformes; the former might be an ancestral petrel, the latter an ancient albatross.If they can be assigned to a modern order (which is highly doubtful), with the possible exception of Marinavis they would probably not be considered Procellariiformes.Marinavis, Neogaeornis, Novacaesareala, Torotix and Tytthostonyx seem to be "higher waterbirds" but cannot be reliably assigned to any of the modern lineages; rather, most of them appear to be still very close to the last common ancestor of Procellariiformes, cormorants, loons, pelicans, penguins, and perhaps also grebes, flamingos, storks, tropicbirds and waders.Parascaniornis on the other hand was formerly assigned to the Procellariiformes by some, but it is actually a hesperornithiform synonymous with Baptornis.Primodroma, a fossil procellariiform from the Early Eocene London Clay of England, may belong to the Hydrobatidae (perhaps specifically to the Oceanitinae) or maybe the Diomedeoididae.There are a total of around 125 living species of Procellariiformes worldwide, and the order is typically divided into four extant and one prehistorically extinct families:.estesi), it is the best candidate for the most ancient procellariiform known to date; it pre-dates the evolutionary radiation that brought about the modern families and hence would occupy a basal position in the order