Messelirrisor
| Messelirrisor Temporal range: Middle Eocene,   | |
|---|---|
| Fossil of Messelirrisor halcyrostris | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Aves | 
| Order: | Bucerotiformes | 
| Family: | †Messelirrisoridae Mayr, 1998  | 
| Genus: | †Messelirrisor Mayr, 1998  | 
| Type species | |
| Messelirrisor halcyrostris Mayr, 1998  | |
| Other species | |
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The extinct Messelirrisor is a genus of Bucerotiformes, the sole representative of the family Messelirrisoridae. They were tiny hoopoe-like birds that were the earliest representatives of the hoopoe/wood-hoopoe lineage, and they were among the predominant small forest birds of Central Europe during the Middle Eocene (some 49-37 mya). Fossilized remains of Messelirrisor have been found in the Messel Pit of Hesse, Germany.