part of mandibular segment embryonic mandibular segment embryonic gnathal neuromere embryonic mandibular neuromere fly_anatomy.ontology The most anterior of the embryonic subesophageal neuromeres. It is part of the mandibular segment, and it is located anterior to the maxillary neuromere, and posterior to intercalary segment and its neuromere, the tritocerebrum. FBbt:00001086 VFB:FBbt_00001086 embryonic neuromere