part of has fasciculating neuron projection develops from larval mesothoracic posterior intermediate commissure adult posterior intermediate commissure adult mesothoracic posterior posterior intermediate posterior commissure 2021-01-11T13:45:03Z mesothoracic pPIp 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 12B and 23B neurites, which cross the midline slightly posterior to the posterior posterior intermediate anterior commissure (Court et al., 2020). It is slightly posterior and ventral to the mesothoracic anterior posterior intermediate commissure (Court et al., 2020). MesoNm pPIp FBbt:00048485 fly_anatomy.ontology VFB:FBbt_00048485 lineage 23 secondary neuron hemilineage 12B secondary neuron adult mesothoracic neuromere