18/10/2021
Protopelicanus has been described from the Late Eocene sediments, which was originally classified as a pelican, but now its taxonomic status is uncertain (insertae sedis). The bird may belong to another family of pelicans, or to sulopods, or to bony teeth. The Miocene pelican Liptornis from Patagonia has the status of nomen dubium (of dubious authenticity), as its description was based on fragments that do not provide sufficient arguments for the identification of the bird.