Masillamys

 
Masillamys is an extinct genus of rodent. It was named in 1954 by Tobien based on fossils found in the Quercy Phosphorites Formation. It is considered to be a sister genus to the "Hartenbergeromys, Lophiparamys, Mattimys, Microparamys, Pantrogna, Sparnacomys", and "Strathcona" genera.