The secret life of millipedes

Male adult helminthomorph millipedes usually have one or two pairs of legs from their seventh segment modified into sexual appendages. These specialized gonopods are used as claspers to hold the female during mating or to transfer sperm. New research published in BioMed Central's open access journal Frontiers in Zoology has looked in detail at millipede development and the internal reorganization needed to produce functional gonopods.

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