part of continuous with adult anterior dorsal mesothoracic nerve wing nerve costal vein costal nerve 2010-03-17T03:58:37Z fly_anatomy.ontology Nerve that travels through the medial costal vein of the proximal anterior wing margin (Palka et al., 1979), it remains distinct from the combined L1-L3 nerve until both nerves leave the wing via the anterior dorsal mesothoracic nerve (Murray et al., 1984). It is composed of axons collected from the marginal sensilla of the distal, medial and proximal costa, as well as the tegula (Palka et al., 1979). FBbt:00100123 VFB:FBbt_00100123