SteiromysSteiromys is an extinct genus of caviomorph rodent that lived in South America during the Miocene epoch.TaxonomyOriginally, the species Eosteiromys annectens was classified as a member of the genus Steiromys. However, detailed taxonomic study has moved the species to the genus Eosteiromys.PalaeobiologyLocomotionThe foot morphology of Steiromys suggests it may have been scansorial.