| Eocypselus Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Clade: | Strisores |
| Order: | Apodiformes |
| Family: | †Eocypselidae |
| Genus: | †Eocypselus Harrison, 1984 |
| Type species | |
| †Eocypselus vincenti Harrison, 1984
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| Other species | |
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Eocypselus[1] is a genus of prehistoric birds believed to be ancestral to modern hummingbirds and swifts.[2] Five species of Eocypselus are currently known.[3] Compared with modern apodiforms, it was a better percher and had shorter wing feathers, and might have been nocturnal.[4]
- ^ Harrison, C.J.O. (1984). A revision of the fossil swifts (Vertebrata, Aves, suborder Apodi), with descriptions of three new genera and two new species. ;;Meded. Werkgr. Tert. Kwart. Geol.;; 21: 157–177.
- ^ Mayr, G. (2010). Reappraisal of Eocypselus – a stem group representative of apodiform birds from the early Eocene of Northern Europe. Palaeobiodiversity and Palaeoenvironments, 90: 395-403.
- ^ Mayr, G.; Kitchener, A.C. (2024). "New fossils of Eocypselus and Primapus from the British London Clay reveal a high taxonomic and ecological diversity of early Eocene swift-like apodiform birds". Ibis (advance online publication). doi:10.1111/ibi.13323.
- ^ Mayr, Gerald; Kitchener, Andrew C. (2024). "New fossils of Eocypselus and Primapus from the British London Clay reveal a high taxonomic and ecological diversity of early Eocene swift-like apodiform birds". Ibis. doi:10.1111/ibi.13323.