In situ hybridization of ApVGLUT in buccal and cerebral ganglia. Based on their location in the rostral buccal ganglion, putative B38 (white arrows) and B21 (black arrows) were indicated. rBG, rostral buccal ganglion; cBG, caudal buccal ganglion; dCG, dorsal cerebral ganglion; vCG, ventral cerebral ganglion. Scale bar, 200 μm.