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Temporal range: Late Cretaceous, 85–70 Ma
Patagopteryx skeleton.jpg
Skeleton restoration of Patagopteryx deferrariisi
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Euornithes
Clade: Patagopterygiformes
Alvarenga & Bonaparte, 1992

Patagopterygiformes is a group of large Mesozoic ground birds from South America. It contains at most two species: Patagopteryx deferrariisi, and Alamitornis minutus.[1]


  1. ^ Federico L. Agnolin and Agustín G. Martinelli (2009). "Fossil birds from the Late Cretaceous Los Alamitos Formation, Río Negro Province, Argentina". Journal of South American Earth Sciences. 27: 42–49. doi:10.1016/j.jsames.2008.09.003.