Nautilus Anatomy: Unique eyes, shells and tentacles.
2021年6月22日 · The Neural Anatomy of a Nautilus. The anatomy of the nautilus brain is the same basic structure as that of other cephalopods in as much as it forms a ring around the oesophagus just behind the mouth. It is composed of supra- and sub-oesophageal regions, perioesophageal (magnocellular) lobes and, laterally, the optic lobes.
Nautilus - Wikipedia
Nautili are the sole living cephalopods whose bony body structure is externalized as a planispiral shell. The animal can withdraw completely into its shell and close the opening with a leathery hood formed from two specially folded tentacles.
Nautilus : biology, systematics, and paleobiology as viewed from …
2016年2月29日 · The most important scientific questions about the anatomy, physiology, evolution and natural history of the genus Nautilus (Cephalopoda; Figs. 1, 2, 3) have centered more on its value in deciphering the overall evolution of various extinct Cephalopoda than on understanding its position in modern ecosystems (i.e., Shigeno et al. 2008).
Chambered nautilus - Wikipedia
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 ...
Cephalopods: Octopus, Squid, Cuttlefish, and Nautilus
Octopus, squid, cuttlefish, and nautilus all have differently shaped pupils— an octopus has a rectangular pupil, a cuttlefish has a w-shaped pupil, and a squid’s pupil is circular. Only the nautilus has a comparatively basic eye anatomy, relying on a pinhole pupil without a lens.
The most important scientific questions about the anatomy, physiology, evolution and natural history of the genus Nautilus (Cephalopoda; Figs. 1, 2, 3) have centered more
Nautilus - American Oceans
Nautilus has a unique anatomy that includes a spiral-shaped shell, two large eyes, and a pair of tentacles. The Nautilus is often referred to as a “living fossil” due to its ancient lineage and the fact that it has remained relatively unchanged for millions of years.
What is a nautilus? - NOAA's National Ocean Service
2024年6月16日 · The nautilus is a mollusk that uses jet propulsion to roam the ocean deep. Writers, artists, and engineers have long marveled at the nautilus’s beauty and swimming abilities. The chambered or pearly nautilus is a cephalopod (a type of mollusk)—a distant cousin to squids, octopi, and cuttlefish.
Nautiluses: Characteristics, Shells and Species
Nautiluses are marine cephalopods — molluscs related to squid and octopus. But unlike other cephalopods, they are housed within a distinctive smooth, hard shell. Nautilus live in the open water in and around coral reefs in the Pacific and Indian Oceans.
Nautiloidea - nautilus - bumblebee
Nautilus natural history, photographs and diagrams showing the interanl anatomy and body pattern.
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