part of develops from embryonic stomatogastric nervous system intermediate vesicle of iSNSP embryonic hypocerebral ganglion fly_anatomy.ontology FBbt:00005669 Small ganglion of the embryonic stomatogastric nervous system. By stage 16 it is located on the left hand side of the embryo, between the two brain hemispheres and behind the supraesophageal commissure. It is more compact than the paraesophageal ganglion and occupies a more dorsal position. It contains approximately 10-12 neurons. VFB:FBbt_00005669 hypocerebral ganglion hypocerebral/paraesophageal ganglion primordium anterior ectoderm derivative