Organ of Valenciennes

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The organ of Valenciennes, named after the French naturalist Achille Valenciennes, is one of two secondary sexual organs of the female of the genus Nautilus . The other is Owen's laminated organ. Its exact function is unknown. [1]

Achille Valenciennes French zoologist, ichthyologist, and malacologist

Achille Valenciennes was a French zoologist.

Nautilus family of molluscs

The nautilus is a pelagic marine mollusc of the cephalopod family Nautilidae, the sole extant family of the superfamily Nautilaceae and of its smaller but near equal suborder, Nautilina.

Owen's laminated organ, named after the 19th century English biologist Richard Owen, is one of two secondary sexual organs of the female of the Nautilus genus. The other is the organ of Valenciennes. Its exact function is unknown.

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Van der Hoeven's organ is the infrabuccal lamellar organ in the adult male of genus Nautilus. It consists of a pair of fleshy narrow parallel lobes each containing 15-19 lamellae. It is analogous to Owen's laminated organ of the females, which is also infrabuccal and also lamellar, though females have an additional secondary sexual organ, the organ of Valenciennes. It along with the spadix and antispadix comprise the secondary sexual organs of the male. Its function has been described as possibly olfactory, but since its discovery in the mid nineteenth century its exact function, like that of its counterpart, has never been adequately explained— this is why it remains named after the naturalist who first described it rather than having an organ name like "heart" or "gill".

References

  1. Arthur Willey (1902). Zoological Results Based on Material from New Britain, New Guinea, Loyalty Islands and Elsewhere: The anatomy and development of Peripatus novae-britanniae. University Press. pp. 778–9.