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(A) Anterior view of labrum and first labial segment. (B) Lateral view of labrum. (C) Enlarged view of sensilla trichodea I (St I). (D) Enlarged view of outlined box in (B), showing the tip of labrum. (E) Enlarged view of surface in (B) (black arrow). (F) Enlarged view of cuticular pores (Cpo). (G) Enlarged view of triquetrous cuticular processes (Tcp).
