Chupkaornis
| Chupkaornis | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Avialae |
| Clade: | †Hesperornithes |
| Genus: | †Chupkaornis Tanaka et al., 2017 |
| Type species | |
| †Chupkaornis keraorum Tanaka et al., 2017
| |
Chupkaornis is a genus of prehistoric flightless birds from the Late Cretaceous (Coniacian-Santonian) Kashima Formation of Hokkaido, Japan.
Description
Diagnostic traits of Chupkaornis include a finger-like projected tibiofibular crest of femur, deep, emarginated lateral excavation with a sharply defined edge of the ventral margin of the thoracic vertebrae, and the heterocoelous articular surface of the thoracic vertebrae.[1]
Phylogeny
Chupkaornis is recovered by Tanaka et al. (2017) as more derived than the Cenomanian-age form Pasquiaornis, but less advanced than Brodavis and Baptornis.[1]