Corpus allatum
- Pronunciation
- /KOR-pus uh-LAY-tum/
- Category
- Physiology
- Singular
- corpus allatum
- Plural
- corpora allata
Definition
A paired in insects, typically located behind the brain and associated with the , that synthesizes and secretes (JH). The gland's activity is regulated by neuropeptides from the brain, particularly and allatotropins, and its secretory output declines or ceases during the final larval instar to permit . In some , the persists in and continues JH production to regulate , , and differentiation in social insects.
Etymology
New Latin, from Latin corpus 'body' + allatum 'carried to, brought alongside', referring to its position adjacent to the corpus cardiacum
Example
In the (Manduca sexta), cauterization of the during the final larval instar eliminates and triggers precocious , producing a small pupa that develops into a dwarf .
Synonyms
- CA
Related Terms
- Juvenile hormone
- corpus cardiacum
- allatostatin
- allatotropin
- prothoracicotropic hormone
- Metamorphosis
- ecdysteroid
Usage Notes
The plural is standard in scientific literature; the abbreviation CA is common in endocrinology papers. The corpus allatum is anatomically distinct from but functionally coupled to the corpus cardiacum, which stores and releases brain-derived neuropeptides including . In some insect groups (e.g., certain and ), the glands may fuse or show modified anatomy, but the term remains applicable.