part of has fasciculating neuron projection develops from larval mesothoracic posterior intermediate commissure adult posterior intermediate commissure adult mesothoracic dorsal posterior intermediate commissure 2021-01-11T13:36:41Z fly_anatomy.ontology VFB:FBbt_00048482 MesoNm dPI mesothoracic dPI FBbt:00048482 Commissure of the adult mesothoracic neuromere that is derived from the larval mesothoracic posterior intermediate commissure and is formed by hemilineage 19B neurons (Court et al., 2020). It is the most dorsal of the adult posterior intermediate commissures in this neuromere and it crosses the midline close to, but anterior to, the mesothoracic posterior dorsal commissure (Court et al., 2020). hemilineage 19B secondary neuron adult mesothoracic neuromere