infraorbital foramen n.
The external opening of the infraorbital canal on the front surface of the body of the maxilla.
In Eutamias townsendii, however, the infraorbital foramen is rounded as much as in the subgenus Eutamias and in the genus Tamias.
In the skull the infraorbital foramen is small as in Squirrels.
On the side of the rostrum the premaxillary forms the anterointernal border of the infraorbital foramen.
Skull elongated, rather narrow and depressed; facial portion especially narrow; infraorbital foramen very large.