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Argonaut or Paper Nautilus

Vintage illustration of an Argonaut, also called a Paper Nautilus. The argonauts (genus Argonauta, the only extant genus in the family Argonautidae) are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin egg-case that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. It is used as a brood chamber and for trapped surface air to maintain buoyancy. This image has been colour enhanced.
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Title:
Argonaut or Paper Nautilus
Caption:
Vintage illustration of an Argonaut, also called a Paper Nautilus. The argonauts (genus Argonauta, the only extant genus in the family Argonautidae) are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin egg-case that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. It is used as a brood chamber and for trapped surface air to maintain buoyancy. This image has been colour enhanced.
Credit:
Album / Science Source
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Image size:
4050 x 3302 px | 38.3 MB
Print size:
34.3 x 28.0 cm | 13.5 x 11.0 in (300 dpi)
Keywords: