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. 2009 Oct 23;4(10):e7537. doi: 10.1371/journal.pone.0007537

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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The spermatophore is the sperm- and accessory gland fluid-filled package that male crickets produce and hold externally (A) prior to copulation. During copulation, the male transfers the spermatophore (B) to the female via threading the tip of the spermatophore duct (see arrow in B) into the reproductive tract of the female. The white material inside the spermatophore in (B) is the ejaculate.