| Amphitherium Temporal range: Middle Jurassic
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| Drawing of the jaw of A. prevostii from the Stonesfield Slate | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Amphitheriida |
| Family: | †Amphitheriidae |
| Genus: | †Amphitherium Blainville, 1838 |
| Type species | |
| †Amphitherium prevostii (Mayer, 1832)
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| Other species | |
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Amphitherium is an extinct genus of stem cladotherian mammal that lived during the Middle Jurassic of England.[1] It was one of the first Mesozoic mammals ever described. A recent phylogenetic study found it to be the sister taxon of Palaeoxonodon.[2] It is found in the Forest Marble Formation and the Taynton Limestone Formation.
- ^ Butler, P. M.; Clemens, W. A. (2001). "Dental Morphology of the Jurassic Holotherian Mammal Amphitherium, with a Discussion of the Evolution of Mammalian Post-Canine Dental Formulae". Palaeontology. 44 (1): 1–20. Bibcode:2001Palgy..44....1B. doi:10.1111/1475-4983.00166.
- ^ Panciroli E; Roger B.J. Benson; Richard J. Butler (2018). "New partial dentaries of amphitheriid mammalian Palaeoxonodon ooliticus from Scotland, and posterior dentary morphology in early cladotherians". Acta Palaeontologica Polonica. in press. doi:10.4202/app.00434.2017.