Back Onychonycteris finneyi Catalan Onychonycteris German Onychonycteris Spanish Onychonycteris ID Onychonycteris finneyi Italian オニコニクテリス Japanese Onychonycteris finneyi Polish Onychonycteris finneyi Portuguese Onychonycteris finneyi Russian Onychonycteris SIMPLE
| Onychonycteris Temporal range: Early Eocene
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| Fossil | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Chiroptera |
| Family: | †Onychonycteridae |
| Genus: | †Onychonycteris |
| Species: | †O. finneyi
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| Binomial name | |
| †Onychonycteris finneyi Simmons, Seymour, Habersetzer, and Gunnell 2008
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Onychonycteris is the more primitive of the three oldest bats known from complete skeletons, having lived in the area that is current day Wyoming during the Eocene period, 52.5 million years ago.