- craniobuccal pouch
Rathke\'s pouch (an embryonic invagination of the stomodeal ectoderm (roof of the embryonic mouth) which migrates dorsally to come into contact with diencephalon. It differentiates into the anterior pituitary gland or adenohypohysis. It becomes a blind naso-hypophyseal canal in some Agnatha or develops secondary opening to the outside with or without a connection to the mouth)
Dictionary of ichthyology. 2009.