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Term:
Parent Terms Term With Siblings Child Terms
absent fourth pharynegal pouch 
absence of the fourth endodermal branchial pouch, normally located between the fourth and sixth branchial arches (a fifth arch never establishes itself in amniotes); in most mammals, excluding rodents, the dorsal part of each fourth pouch develops into a superior parathyroid gland (parathyroid IV), which lies on the dorsal surface of the thyroid gland; the elongated ventral part of each fourth pouch develops into the ultimopharyngeal body, which fuses with the thyroid gland, giving rise to the calcitonin-producing parafollicular or C-cells of the thyroid gland

Synonyms
Exact Synonyms: absent 4th branchial pouch ;   absent 4th pharyngeal pouch ;   absent fourth branchial pouch
Definition Sources: https://orcid.org/0000-0002-6490-7723, PMID:20144910

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