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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 ...
Nautilus is a marine cephalopod genus in the mollusk family Nautilidae. ... Nautilus repertus: Nomen dubium, likely a giant form of N. pompilius [4] [10]
One form from Indonesia and northern Australia, once called N. repertus, may reach 25.4 cm (10.0 in) in diameter. [24] However, most nautilus species never exceed 20 cm (8 in). Nautilus macromphalus is the smallest species, usually measuring only 16 cm (6 + 1 ⁄ 2 in).
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 ...
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.
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Shouldn't Nautilus repertus be included? It's included on the chambered nautilus page, but not here for some reason. Since this was the first "species" to be breed in captivity, it seems notable enough for inclusion. Jojuko 01:15, 25 January 2010 (UTC)
The Nautilaceae are represented by Nautilus and Allonautilus, genera included in the Nautilidae. Species in the Nautilaceae are generally smooth and involute with straight to strongly sinuous sutures and a small siphuncle. Some groups have sinuous plications or ribs.