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The chambered nautilus (Nautilus pompilius), also called the pearly nautilus, is the best-known species of nautilus. The shell, when cut away, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral, although it is not a golden spiral. The shell exhibits countershading, being light on the bottom and dark on top. This ...
Cutaway of a nautilus shell showing the chambers arranged in an approximately logarithmic spiral. The plotted spiral (dashed blue curve) is based on growth rate parameter b = 0.1759 {\displaystyle b=0.1759} , resulting in a pitch of arctan b ≈ 10 ∘ {\displaystyle \arctan b\approx 10^{\circ }} .
Nautilus belauensis. Much of what is known about the extinct nautiloids is based on what we know about modern nautiluses, such as the chambered nautilus, which is found in the southwest Pacific Ocean from Samoa to the Philippines, and in the Indian Ocean off the coast of Australia. It is not usually found in waters less than 100 meters (328 ...
7 Summary. 8 Analysis. 9 See also. 10 Notes. 11 References. 12 External links. ... and to the chambered nautilus. [5] Telfair Square is located on Barnard, between ...
Two Shells (1927) by Edward Weston. Two Shells, also known as Shells, is a black and white photograph taken by American photographer Edward Weston, in 1927.It was part of a series containing 26 photographs of sea shells from the same year, including Weston's famous Nautilus.
The first and oldest fossil of chambered nautilus displayed at Philippine National Museum. The word nautilus is derived from the Greek word ναυτίλος nautílos "sailor", it originally referred to a type of octopus of the genus Argonauta, also known as 'paper nautilus', which were thought to use two of their arms as sails. [6] [7]
Argonauts surrounding the Nautilus, in Jules Verne's novel Twenty Thousand Leagues Under the Seas. Argonauts are featured in Twenty Thousand Leagues Under the Seas, noted for their ability to use their tentacles as sails, though this is a widespread myth. A female argonaut is also described in Marianne Moore's poem "The Paper Nautilus".
Allonautilus perforatus, also known as the Bali chambered nautilus, is a species of nautilus native to the waters around Bali, Indonesia. It is known only from drifted shells and, as such, is the least studied of the six recognized nautilus species. Thus, not much is known about it outside of the shell.