lateral commissure
lateral commissure
"Region of the braincase which bears the facets for the hyomandibula in fishes. This region disappears in the origin of tetrapods and the space it occipied comes to contribute to the fenestra vestibulii. Clack, JA, 2001. Ch. 23, The otoccipital region. In Major Events in Early Vertebrate Evolution. Per Ahlberg editor."