3D scans reveal that beetles have secret pockets on their backs

If you complimented a woman Lagria beetle on the pupa’s shell, she would probably reply, “Thank you, it has pockets!”

These special pockets contain an important treasure: symbiotic bacteria which protect the pupa (and the larva that precedes this stage) from a potentially lethal fungus. When the adult beetle emerges from the pupa, the friction from metamorphosis pushes the bacteria out of these pockets into the beetle’s abdominal glands.

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