probosciform penis

anatomy

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July 13, 2026

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The term "probosciform penis" refers to a penis that is shaped like a proboscis, which is a long, flexible snout or trunk, such as that of an elephant. This type of penis is found in some invertebrates, like certain barnacles.12

In barnacles, the probosciform penis is an elongated structure used for injecting spermatozoa. It is located between the last pair of legs and may be covered with fine setae or spines. The function of this specialized penis is to transfer sperm into the female's mantle cavity during egg-laying. This contrasts with the penises of many vertebrates, which are typically erectile organs with complex internal structures for sperm transfer.234

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cirripede
The reproductive system
…enters the base of the probosciform penis, situated between the last pair of legs, and runs its length. The penis may be clothed with fine setae, randomly distributed or arranged in discrete rows, or modified into simple or complex spines and hooks.
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…enters the base of the probosciform penis, situated between the last pair of legs, and runs its length. The penis may be clothed with fine setae, randomly distributed or arranged in discrete rows, or modified into simple or complex spines and hooks.
Read More