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Spineless Sex

Not to be outdone by vertebrates, invertebrates employ a suite of interesting structures and behaviors to accomplish procreation.

By The Scientist Staff | July 1, 2014

The tip of a bean weevil (<em>Callosobruchus maculatus</em>) penis is covered in hard spines that unfurl in the female genital tract.

The tip of a bean weevil (Callosobruchus maculatus) penis is covered in hard spines that unfurl in the female genital tract.

© ANDREW SYRED, SHEFFIELD UNIVERSITY/SCIENCE SOURCE

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