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| Lambdotherium Temporal range: Eocene
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Perissodactyla |
| Family: | †Brontotheriidae |
| Genus: | †Lambdotherium Cope, 1880 |
Lambdotherium ("wave beast") is a genus of North American brontothere.[1]