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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 (from Latin nautilus 'paper nautilus', from Ancient Greek ναυτίλος nautílos 'little sailor') [3] are the ancient pelagic marine mollusc species of the cephalopod family Nautilidae. This is the sole extant family of the superfamily Nautilaceae and the suborder Nautilina .
Nautilus have been noted to exhibit an extensive range of depth, close to 500 metres, however, they were demonstrated to be at risk of implosion when exceeding their depth and pressure limits. Depending on the species, the shells of live Nautilus will collapse at depths of 750 metres or deeper. [18] [4]
Allonautilus scrobiculatus, or otherwise known as the crusty nautilus or fuzzy nautilus is a species of cephalopod. A. scrobiculatus ' most recently sighting was in July 2015 by biologist Peter Ward of the University of Washington. Ward's colleague, Bruce Saunders, a geologist from Bryn Mawr College was the one who had initially sighted the ...
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.
On this day 57 years ago, Nautilus-- the world's first nuclear submarine -- accomplished its first undersea voyage to the North Pole. The submarine boasted huge proportions of 3,180 tons ...
When motionless, Nautilus can only extract 20% of oxygen from the water. [62] The jet velocity in Nautilus is much slower than in coleoids, but less musculature and energy is involved in its production. [75] Jet thrust in cephalopods is controlled primarily by the maximum diameter of the funnel orifice (or, perhaps, the average diameter of the ...
Nautilus vitiensis is a species of nautilus native to the waters of Fiji. It was described as a separate species in 2023. It was described as a separate species in 2023. An interesting discovery regarding this new species was revealed by the geographic component of this species taxonomy.