part of ring gland adult endocrine system adult ring gland 2021-02-08T14:05:50Z fly_anatomy.ontology FBbt:00049278 ring gland of the adult Cluster consisting of the corpus allatum (CA), corpus cardiacum (CC) and hypocerebral ganglion of the adult (Hartenstein, 1993). During pupal stages, the ring gland migrates posteriorly to its adult position, just anterior to the proventriculus (cardia), the prothoracic gland degenerates and the corpus cardiacum becomes fused to the hypocerebral ganglion (Dai and Gilbert, 1991; Nassel and Zandawala, 2020).