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Ultrastructure of the neuropile of ladybeetles after larval egression and onset of the bodyguard behaviour. (a) Samples were characterized by a marked vacuolization of glial cells and (b) axon swelling. (c) Fingerprint-like structures were numerous within axons. (d) Autophagolysosomes were found within the cell soma of neurons. a, axon; a*, axon swelling, l, lipid droplet; t, trachea; black arrows, vacuoles; thick arrows, fingerprint-like structures; large arrows, phagosomes.
