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of France and European Russia, where they cohabited notably with dinocephalians. These last caseids still show a certain morphological diversity with medium to large herbivores (Ennatosaurus and Lalieudorhynchus), as well as small predatory or omnivorous forms such as Phreatophasma and possibly Eunotosaurus. Caseids are so far unknown in Upper Permian strata and probably disappeared at the end of the Middle Permian. They were

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