The Eumuroida are a clade defined in 2004 by Steppan et al. to describe a group of muroid rodents. The clade is not defined in the standard taxonomic hierarchy, but it is between superfamily and family. Jansa and Weksler (2004) noted that the Eumuroid ancestors likely had hamster-like (cricetid) molars as opposed to mouse-like molars (murid). Essentially, the occlusal surface of the molars probably had two rows of cusps (cricetid) instead of three (murid).