Unlike all other rodents who have the opening of the infraorbital canal facing forward, geomyoids have an infraorbital canal that faces to the side.
The infraorbital and mandibular arise from a common stem, the terminal part of which anastomoses with the external carotid.
Near the middle of the floor, located infraorbital groove, which leads to the infraorbital foramen.
Dasyurid type features include the infraorbital foramen away from the jugal and a large hypoconid.
The infraorbital foramina is used as a pressure point to test the sensitivity of the infraorbital nerve.
Geomyoids are most noticeably characterized by the position of the infraorbital canal.
Infraorbital nerve labeled at center left, at the nose.
It passes through the ring of the stapes and divides into supraorbital, infraorbital, and mandibular branches which follow the three divisions of the trigeminal nerve.
