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Temporal range: Late Cretaceous, 80 Ma
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Enantiornithes
Genus: Elsornis
Chiappe et al., 2007
Species: E. keni
Binomial name
Elsornis keni
Chiappe et al., 2007

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]


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.


  1. ^ Chiappe, L.M. Suzuki, S. Dyke, G.J. Watabe, M. Tsogtbaatard, K. & Barsboldd, R. (2007) A new Enantiornithine bird from the Late Cretaceous of the Gobi desert. Journal of Systematic Palaeontology 5(2):193-208.