Mookomys(?) bodei Wilson, from the Arikareean of California, is referred to the genus Tenudomys Rensberger, and two species previously referred only questionably to this genus, T. dakotensis (MacDonald) and T. basilaris Korth are definitely assigned to this genus, based on the association of upper and lower dental elements of T. bodei.At present it is impossible to assign Tenudomys to a recognized geomyoid family, but several cranial features ally it more closely to the Heteromyidae and Geomyidae than other geomyoids.