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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.
| Elsornis Temporal range: Late Cretaceous, | |
|---|---|
Scientific classification  | |
| 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 |
| Binomial name | |
| †Elsornis keni Chiappe et al., 2007 | |
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] It may have glided like an Archaeopteryx, climbing in trees so hunt for its prey on the ground. However, if this is not the case, it may have hunted on the ground, snatching up small vertebrates and bugs. Like the other members of Avisauridae, it probably had small non-serrated teeth it used for hunting, and possibly scavenged the carcasses left by other, more formidable carnivores.
A study by Atterholt et al. in 2018 places Elsornis in the family Avisauridae.[2]
The Genus name Elsornis is derived from the Mongolian word "Els", meaning "sand", and "ornis", the Greek word for "bird". The species name "keni" honors Mr. Ken Hayashibara.
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