Physornis

Physornis Temporal range: Mid-Late Oligocene (Deseadan) ~29.2–26.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Cariamiformes
Family:	†Phorusrhacidae
Genus:	†Physornis
Species:	†P. fortis
Binomial name
†Physornis fortis Ameghino 1894
Synonyms
Aucornis eurhynchus Ameghino 1898

Physornis is an extinct genus of giant flightless predatory birds of the family Phorusrhacidae or "terror birds", most closely related to Paraphysornis, that lived in Argentina. The type species is P. fortis. It lived during the Middle to Late Oligocene (Deseadan). Few fossils are known, but the available material suggests that Physornis was one of the largest phorusrhacids.^[1]