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Repenomamus giganticus

Living in the Early Cretaceous of china the genus Repenomamus is notable for a few reasons, it is currently the largest known Mesozoic mammal with R. giganticus being the size of a badger, however this is not the most remarkable thing about this genus, Repenomamus hunted Dinosaurs, multiple remarkable specimens showing feeding behaviour on juvenile Psittacosaurus and a recent publication showing an adult R. robustus actively predating on a full grown adult Psittacosaurus.