Pseudotomus is an extinct genus of ischyromyid rodent from Eocene North America. Pseudotomus was a large early rodent with habits similar to ground squirrels. It belongs to the tribe Manitshini and the subfamily Paramyinae.
"Ischyrotomus" is a junior synonym of Pseudotomus, with Ischyrotomus oweni as a synonym of Pseudotomus robustus in particular.
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