part of retrocerebral complex UBERON:0012325 FBbt:00001718 retrocerebral neuroendocrine complex This is the common part of the adult (CA, CC, HG) and larval (CA, CC, PG) ring glands, but terminology seems to be very rarely used for the larva - https://orcid.org/0000-0002-1373-1705. fly_anatomy.ontology CC-CA The endocrine complex which consists of the corpus cardiacum and corpus allatum (Hartenstein, 2006; Lee et al., 2008). ring gland cell cluster organ