Ivantosaurus
Ivantosaurus is an extinct genus of therapsid that lived in Russia during the Wordian stage of the Permian period, named in honor of paleontologist Ivan Antonovich Efremov.
| Ivantosaurus Temporal range: Wordian, | |
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| Genus: | †Ivantosaurus Tchudinov, 1983 |
| Type species | |
| †Ivantosaurus ensifer Tchudinov, 1983 | |
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