Patagopterygiformes is an extinct group of large terrestrial ornithuromorphs from the Late Cretaceous of South America. It contains at most three genera: ''

Patagopteryx ''Patagopteryx'' is an extinct monotypic genus of patagopterygiforms that lived during the Late Cretaceous, around 80 mya, in what is now the Sierra Barrosa in northwestern Patagonia, Argentina. About the size of a chicken, it is the earliest ...

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Alamitornis ''Alamitornis'' is an extinct genus of basal ornithuromorph bird, possible within the family Patagopterygidae. Remains have been found in the Upper Cretaceous Los Alamitos Formation at Los Alamitos, Río Negro Province, Argentina. It was first ...

'' and possibly ''

Kuszholia ''Kuszholia'' (meaning "Milky Way bird" after the Kazakh term for the Milky Way, ''kus zholi'') is the name given to a genus of primitive birds or bird-like dinosaurs from the Late Cretaceous. They were possibly coelurosaurs close to the ancest ...

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References

Prehistoric euornitheans Late Cretaceous dinosaurs of South America Cretaceous Argentina Fossils of Argentina Taxa named by José Bonaparte {{Theropod-stub