| Syodon Temporal range: Middle Permian
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Therapsida |
| Suborder: | †Dinocephalia |
| Family: | †Anteosauridae |
| Genus: | †Syodon Kutorga, 1838 |
| Species: | †S. biarmicum
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| Binomial name | |
| †Syodon biarmicum Kutorga, 1838
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Syodon (from Greek: kleio, "close, shut" and Greek: odon, "tooth", "closed-root tooth")[1] is an extinct genus of dinocephalian therapsids that lived approximately 267-260 million years ago during the middle Permian period of the Paleozoic era. These therapsids, discovered in Russia[2] were initially believed to be true mammals. Syodon was first named by Stephan Kutorga in 1838.[3] The fossils of these synapsids were first discovered in the Molotov Province region of Russia in limestone beds with a high content of copper. However, scientists believe that these organisms likely come from higher rock beds due to increased specializations in their morphology.[4]
- ^ "Syodon". Paleofile. Archived from the original on April 14, 2023.
- ^ "Palaeos Vertebrates Therapsida: Anteosauridae".
- ^ Kutorga, S. S. 1838. Beitrag zur Kenntniss der organischen U ̈ berreste des Kupfersandsteins am Westlichen Abhange des Urals. St Petersburg. Gretsch, 38 pp.
- ^ Olson, Everett C. "Catalogue of Localities of Permian and Triassic Terrestrial Vertebrates of the Territories of the USSR." The Journal of Geology 65.2 (1957): 196-226.