Acron + 7 segments 1. Preantennal 2. Antennal 3. Intercalary 4. Superlingual 5. Mandibular 6. Maxillary 7. Labial Acron small, hidden Chaudonneret, 1966
Acron + 6 segments 1. Preantennal 2. Antennal 3. Intercalary 4. Mandibular 5. Maxillary 6. Labial
昆虫头部6节分节学说
东亚飞蝗的头部 A. 正面观；B. 侧面观
口后桥