part of develops from P3m fiber tract founder cluster lateral cervical tract fly_anatomy.ontology LCT circumesophageal connective FBbt:00001626 VFB:FBbt_00001626 Tract that forms part of the larval cervical connective (Nassif et al., 1998; Hartenstein et al., 2015). It is formed by axons of the P3m cluster which extend anteriorly and ventrally, fasciculate with axons from the P1 fiber tract founder cluster, then extend ventrally toward the subesophageal commissure and subesophageal ganglion (Nassif et al., 1998). embryonic/larval cervical connective fascicle