Agathaumas
dubious genus of ceratopsid dinosaur
Agathaumas ("great wonder") is a dubious genus of a large ceratopsid dinosaur that lived in Wyoming during the Late Cretaceous (65 million years ago). The name comes from Greek, αγαν - 'much' and θαυμα - 'wonder'. It was seen as the largest land animal known at the time of its discovery and might be a synonym of Triceratops. It was related to Ceratops.
| Agathaumas Temporal range: Late Cretaceous,
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| Illustration of the vertebrae and sacrum | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Order: | †Ornithischia |
| Family: | †Ceratopsidae |
| Subfamily: | †Chasmosaurinae |
| Tribe: | †Triceratopsini |
| Genus: | †Agathaumas Cope, 1872 |
| Species: | †A. sylvestris
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| Binomial name | |
| Agathaumas sylvestris Cope, 1872
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