Omnivoropterygidae

Omnivoropterygidae (meaning "omnivorous wings") is a family of primitive avialan dinosaurs known exclusively from the Jiufotang Formation of China, though putative omnivoropterygids are known from the Maevarano Formation of the Maastrichtian of Madagascar.^[1] They had short skeletal tails and unusual skulls with teeth in the upper, but not lower, jaws. Their unique dentition has led some scientists to suggest an omnivorous diet for them.^[2] The family was named by Stephen A. Czerkas & Qiang Ji in 2002, though its junior synonym Sapeornithidae is often used instead, though it was named four years later in 2006.^[3] It is the only named family in the order Omnivoropterygiformes.

Omnivoropterygids Temporal range: Early Cretaceous, 124.5–120 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ (possible Late Cretaceous record)
Fossil specimen of Sapeornis chaoyangensis, Hong Kong Science Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	Avialae
Clade:	Avebrevicauda
Order:	†Omnivoropterygiformes
Family:	†Omnivoropterygidae Czerkas & Ji, 2002
Type species
†Omnivoropteryx sinousaorum Czerkas & Ji, 2002
Genera
†Omnivoropteryx †Sapeornis †Falcatakely? †Zhongornis?
Synonyms
Sapeornithidae Zhou & Zhang, 2006