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SEM images of labrum of Picromerus bidens. (A) Ventral view; (B,C) Enlarged view of box in (A), showing sensilla basiconica (Sb1) and sensilla campaniformia Sca1; (D) Dorsal view; (E) Enlarged view of box in (D); (F) Clusters of microtrichia (mi); lg, labral groove.
