These mice also have a large infraorbital foramen.

Not to be confused with the infraorbital groove and infraorbital foramen, which are on opposite ends of the canal.

As with all members of their suborder, their jaws are hystricognathous, but, unlike their relatives, they have a highly reduced infraorbital foramen.

The medial masseter is enlarged, and passes through an enlarged infraorbital foramen to originate on the side of the rostrum.

Representatives of the family Dipodidae are found in the northern regions of the Old and New Worlds, and are characterized by very large infraorbital foramen, and, in one of the two North American genera, Zapus, by 4 upper cheek teeth.