part of has fasciculating neuron projection develops from larval mesothoracic posterior intermediate commissure adult posterior intermediate commissure adult mesothoracic posterior posterior intermediate anterior commissure 2021-01-11T13:41:57Z FBbt:00048484 fly_anatomy.ontology Commissure of the adult mesothoracic neuromere that is derived from the larval mesothoracic posterior intermediate commissure (Court et al., 2020). It is formed by hemilineage 6B neurites, which cross the midline slightly anterior to the posterior posterior intermediate posterior commissure (Court et al., 2020). It is slightly posterior and ventral to the mesothoracic anterior posterior intermediate commissure (Court et al., 2020). MesoNm pPIa VFB:FBbt_00048484 mesothoracic pPIa hemilineage 6B secondary neuron adult mesothoracic neuromere