involves some kind of sensory organ occupying the maxillary fossa. Uniquely among therapsids, the canal within the maxilla is exposed on the back side of the maxillary fossa, which implies that the canal, carrying the trigeminal nerve, would probably have extended across the fossa, outside of the outline of the skull. Benoit et al.
A sensory organ is situated in the maxillary fossa. Among therapsids, this arrangement is distinctive; the canal within the maxilla is visible on the back side of the maxillary fossa, suggesting that the trigeminal nerve canal would extend across the fossa and beyond the skull's outline. Benoit et al.