| Elsornis Temporal range: Late Cretaceous,
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Avialae |
| Clade: | †Enantiornithes |
| Genus: | †Elsornis Chiappe et al., 2007 |
| Species: | †E. keni
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| Binomial name | |
| †Elsornis keni Chiappe et al., 2007
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Elsornis is a genus of enantiornithine bird. Only one species is known, Elsornis keni. It lived during the Late Cretaceous. It is known from a partially articulated fossil skeleton found in the Gobi Desert in Mongolia.
The holotype fossil is given catalog number MPD - b 100/201. It is in the collection of the Mongolian Palaeontological Center. The fossil was collected at Togrogiin Shiree, South Gobi Aimak, Mongolia; Djadokhta Formation, Late Cretaceous, Campanian.
The fossil is extremely well preserved in three dimensions. It preserves a pneumatized Furcula, which was a character previously unknown in enantiornithines. Chiappe et al. (2007) conclude from the proportions of Elsornis ' pectoral skeleton that it was flightless or nearly so.[1]
A study by Atterholt et al. in 2018 places Elsornis in the family Avisauridae.[2]
