part of has fasciculating neuron projection develops from larval metathoracic posterior intermediate commissure adult metathoracic anterior posterior intermediate commissure 2021-01-11T14:03:19Z FBbt:00047328 metathoracic aPI VFB:FBbt_00047328 MetaNm aPI fly_anatomy.ontology Commissure of the adult metathoracic neuromere that is derived from the larval metathoracic posterior intermediate commissure and is formed by hemilineage 5B neurons (Court et al., 2020). It is the most anterior of the adult posterior intermediate commissures in this neuromere (Court et al., 2020). adult posterior intermediate commissure lineage 5 secondary neuron adult metathoracic neuromere