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Temporal range: Early Cretaceous, 120 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Family: Omnivoropterygidae
Genus: Omnivoropteryx
Czerkas & Ji, 2002
Species: O. sinousaorum
Binomial name
Omnivoropteryx sinousaorum
Czerkas & Ji, 2002

Omnivoropteryx (meaning "omnivorous wing") is a genus of primitive flying bird from the early Cretaceous Upper Jiufotang Formation of China. The authors who described Omnivoropteryx, Stephen Czerkas and Qiang Ji, stated that their specimen closely resembles Sapeornis, but the pubis was longer and, since no skull was known for Sapeornis, they did not consider the two names synonyms.[1] The later discovery of Sapeornis skulls shows that they were indeed similar to Omnivoropteryx. This may make Omnivoropteryx a junior synonym of Sapeornis, and the name may be abandoned.[2]


Czerkas and Ji created the family Omnivoropterygidae to contain the genus Omnivoropteryx, as well as the order Omnivoropterygiformes, though some scientists do not recognize taxa that contain only one genus. Paul Sereno, for example, considered the family Omnivoropterygidae to be invalid because it is redundant and was not given a phylogenetic definition.[3]

The single species O. sinousaorum shows an interesting mix of specialized and generalized characters: the legs were short and well suited for perching on branches, while the wings were long, suggesting it did not need a running or jumping takoff to get into the air. Its skull, on the other hand, was similar to some early oviraptorosaurs, having the structure of a beak designed for crushing and tearing with some teeth at the tip of the upper jaw. Thus, the species may have been an opportunistic omnivore (as the name suggests), utilizing a wide range of food sources, unlike other early birds which were active predators of smaller animals.[1]


  1. ^ a b Czerkas, S. A. & Ji, Q. (2002). "A preliminary report on an omnivorous volant bird from northeast China." In: Czerkas, S. J. (editor): Feathered Dinosaurs and the origin of flight. The Dinosaur Museum Journal 1: 127-135. HTML abstract
  2. ^ Zhou, Z., and Zhang, F. (2003). "Anatomy of the primitive bird Sapeornis chaoyangensis from the Early Cretaceous of Liaoning, China". "Canadian Journal of Earth Sciences", 40: 731-747.
  3. ^ Sereno, P. C. (2005). "Omnivoropterygidae." Stem Archosauria—TaxonSearch [version 1.0, 7 November 2005]