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Encyclopedia > Nautilus
Wikipedia:How to read a taxobox
How to read a taxobox
Nautilus
Nautilus pompilius
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Nautilida
Suborder: Nautilina
Agassiz, 1847
Family: Nautilidae
Blainville, 1825
Genera

Allonautilus
Nautilus Image File history File linksMetadata Nautilus_pompilius. ... Binomial name Nautilus pompilius Linnaeus, 1758 Subspecies Nautilus pompilius pompilius Linnaeus, 1758 Nautilus pompilius suluensis Habe & Okutani, 1988 Synonyms Nautilus repertus Iredale, 1944 The Chambered Nautilus (Nautilus pompilius) is the best known species of nautilus. ... Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... Digimon, the only known animals. ... Classes Caudofoveata Aplacophora Polyplacophora Monoplacophora Bivalvia Scaphopoda Gastropoda Cephalopoda † Rostroconchia † Helcionelloida † ?Bellerophontidae The molluscs (British spelling) or mollusks (American spelling) are the large and diverse phylum Mollusca, which includes a variety of familiar animals well-known for their decorative shells or as seafood. ... Orders Subclass Nautiloidea †Plectronocerida †Ellesmerocerida †Actinocerida †Pseudorthocerida †Endocerida †Tarphycerida †Oncocerida †Discosorida Nautilida †Orthocerida †Ascocerida †Bactritida Subclass †Ammonoidea †Goniatitida †Ceratitida †Ammonitida Subclass Coleoidea †Belemnoidea †Aulacocerida †Belemnitida †Hematitida †Phragmoteuthida Neocoleoidea (most living cephalopods) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida The cephalopods (Greek plural (kephalópoda); head-foot) are the mollusk class Cephalopoda... Orders Palcephalopoda †Plectronocerida †Ellesmerocerida †Actinocerida †Pseudorthocerida †Endocerida †Tarphycerida †Oncocerida †Discosorida Nautilida Neocephalopoda (in part) †Orthocerida †Ascocerida †Bactritida Nautiloids are a group of marine mollusks in the subclass Nautiloidea, which all possess an external shell, the best-known example being the modern nautiluses. ... Species Allonautilus perforatus Allonautilus scrobiculatus Nautilus belauensis Nautilus macromphalus Nautilus pompilius pompilius Nautilus pompilius suluensis Nautilus stenomphalus The nautilus is a marine creature of the class Cephalopoda. ... This article or section does not adequately cite its references or sources. ... Henri Marie Ducrotay de Blainville Henri Marie Ducrotay de Blainville (September 12, 1777 - May 1, 1850) was a French zoologist and anatomist. ... For other uses of the word, please see Genus (disambiguation). ... Species Allonautilus perforatus Allonautilus scrobiculatus (type) The genus Allonautilus contains two species of nautiluses, which differ significantly in terms of morphology from those placed in the sister taxon Nautilus. ... Species Nautilus belauensis †Nautilus clarkanus †Nautilus cookanum Nautilus macromphalus Nautilus pompilius (type) Nautilus pompilius pompilius Nautilus pompilius suluensis †Nautilus praepompilius Nautilus stenomphalus The genus Nautilus contains four species of nautiluses, which differ significantly in terms of morphology from those placed in the sister taxon Allonautilus. ...

Nautilus (from Greek ναυτίλος, 'sailor') is the common name of any marine creatures of the cephalopod family Nautilidae, the sole family of the suborder Nautilina. It comprises six species in two genera, the type of which is the genus Nautilus. Though it more specifically refers to the species Nautilus pompilius, the name chambered nautilus is also used for any species of the Nautilidae. Orders Subclass Nautiloidea †Plectronocerida †Ellesmerocerida †Actinocerida †Pseudorthocerida †Endocerida †Tarphycerida †Oncocerida †Discosorida Nautilida †Orthocerida †Ascocerida †Bactritida Subclass †Ammonoidea †Goniatitida †Ceratitida †Ammonitida Subclass Coleoidea †Belemnoidea †Aulacocerida †Belemnitida †Hematitida †Phragmoteuthida Neocoleoidea (most living cephalopods) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida The cephalopods (Greek plural (kephalópoda); head-foot) are the mollusk class Cephalopoda... Type specimens When a new species is discovered, more important than creating a new and unique name for the species is developing a reasonably detailed description. ... Species Nautilus belauensis †Nautilus clarkanus †Nautilus cookanum Nautilus macromphalus Nautilus pompilius (type) Nautilus pompilius pompilius Nautilus pompilius suluensis †Nautilus praepompilius Nautilus stenomphalus The genus Nautilus contains four species of nautiluses, which differ significantly in terms of morphology from those placed in the sister taxon Allonautilus. ... Nautilus Pompilius (Cyrillic: Наутилиус Помпилиус), frequently abbreviated as Nau, was a legendary Russian rock band active between 1987 and 1997. ... Binomial name Nautilus pompilius Linnaeus, 1758 Subspecies Nautilus pompilius pompilius Linnaeus, 1758 Nautilus pompilius suluensis Habe & Okutani, 1988 Synonyms Nautilus repertus Iredale, 1944 The Chambered Nautilus (Nautilus pompilius) is the best known species of nautilus. ...


Having survived relatively unchanged for millions of years, nautiluses represent the only living members of the subclass Nautiloidea, and are often considered to be "living fossils." Orders Nautilida Bactrida Nautiloids are a group of marine animals which all possess an external shell, the most well known example being the modern nautiluses. ... This article or section does not adequately cite its references or sources. ...


The name "Nautilus" originally referred to the Argonauta, otherwise known as paper nautiluses, because they allegedly use their two expanded arms as sails (cf. Aristotle Historia Animalium 622b). Species Argonauta argo Argonauta bottgeri Argonauta cornuta Argonauta hians Argonauta nodosa Argonauta nouryi Argonauta pacifica Argonauts (genus Argonauta, the only genus in the Argonautidae family) are a kind of pelagic octopus that live close to the surface of warm seas rather than on the sea floor, as nearly all other... Aristotle (Greek: Aristotélēs) (384 BC – March 7, 322 BC) was a Greek philosopher, a student of Plato and teacher of Alexander the Great. ...

Contents

Description

The nautilus is similar in general form to other cephalopods, with a prominent head and tentacles. Nautiluses typically have more tentacles than other cephalopods, up to ninety. These tentacles are arranged into two circles and, unlike the tentacles of other cephalopods, they have no suckers, are undifferentiated and retractable. The radula is wide and distinctively has nine teeth. There are two pairs of gills. Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates, and sometimes to the hairs of the leaves of some insectivorous plants. ... A fish of the family Catostomidae. ... Radula is the scientific name for the toothed chitinous ribbon in the mouth of gastropods. ... gills of a Smooth Newt Gills inside of a tuna head In aquatic organisms, gills are a respiratory organ for the extraction of oxygen from water and for the excretion of carbon dioxide. ...


Nautilus pompilius is the largest species in the genus. One form from western Australia may reach 268 mm in diameter. However, the majority of other nautiluses never exceed 20 cm. Nautilus macromphalus is the smallest species, usually measuring only 16 cm. Binomial name Nautilus macromphalus Sowerby, 1848 The Bellybutton Nautilus (Nautilus macromphalus) is a species of nautilus native to the waters around New Caledonia. ...


The shell

Nautilus shells: N. macromphalus (left), A. scrobiculatus (centre), N. pompilius (right)
Nautilus shells: N. macromphalus (left), A. scrobiculatus (centre), N. pompilius (right)

Nautiluses are the sole cephalopods whose bony structure of the body is externalized as a shell. The animal can withdraw completely into its shell, closing the opening with a leathery hood formed from two specially folded tentacles. The shell is coiled, calcareous, nacreous and pressure resistant (imploding at a depth of about 800 m). The nautilus shell is composed of 2 layers: the outer layer is a matte white, while the inner layer is a striking white with iridescence. The innermost portion of the shell is pearlescent, blue-gray. The osmena pearl, contrarily to its name, is not a pearl, but a jewelry product derived from this part of the shell. Image File history File links Download high-resolution version (921x498, 918 KB) Summary Nautilus shells Image taken by User:Mgiganteus1 Licensing I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1. ... Image File history File links Download high-resolution version (921x498, 918 KB) Summary Nautilus shells Image taken by User:Mgiganteus1 Licensing I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1. ... Various seashells The hard, rigid outer covering of certain animals is called a shell. ... Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates, and sometimes to the hairs of the leaves of some insectivorous plants. ... A piece of nacre Nacre, also known as mother of pearl, is an organic mixture of calcium carbonate (CaCO3) in the form of platy crystals of aragonite and conchiolin (a scleroprotein). ... Matte refers to the following: the surface surrounding a framed picture, between the picture itself and the frame; usually made from coloured card a surface with a non-glossy finish (also matt or mat) a filmmaking technique a smelted sulfide material in extractive metallurgy a form of the name Matthew... The iridescence of the Blue Morpho butterfly wings. ... Strand of akoya pearls from China Pearl farm, Seram, Indonesia A pearl is a hard, rounded object produced by certain animals, primarily mollusks such as oysters. ... Jewelry (the American spelling; spelled jewellery in Commonwealth English) consists of ornamental devices worn by persons, typically made with gems and precious metals. ...


The shell is internally divided into chambers, the chambered section being called the phragmocone. The phragmocone is divided into camerae by septa, all of which are pierced in the middle by a duct, the siphuncle. As the nautilus matures its body moves forward, sealing the camerae behind it with a new septum. The last fully open chamber, also the largest one, is used as the living chamber. The number of camerae increases from around four at the moment of hatching to thirty or more in adults. Phragmocones are the chambered portions of the shell of a cephalopod. ... Camerae (sing. ... Septa (sing. ... The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. ... Albrecht Dürer, Veronica, 1513. ...


The shell coloration also keeps the animal cryptic in the water. When seen from the top, the shell is darker in color and marked with irregular stripes, which makes it blend into the darkness of the water below. On the contrary, the underside is almost completely white, making the animal indistinguishable from brighter waters near the ocean surface. This mode of camouflage is named countershading. (this page is about animals that hide or use camouflage. ... An infant Cuttlefish blends into the surrounding sand substrate. ... Countershading employed by the great white shark. ...


The nautilus shell presents one of the finest natural examples of a logarithmic spiral. (It is sometimes incorrectly claimed to be a golden spiral as well.) A logarithmic spiral, equiangular spiral or growth spiral is a special kind of spiral curve which often appears in nature. ... A golden spiral is a logarithmic spiral whose growth factor b is related to phi, the golden ratio. ...

Buoyancy and movement

In order to swim, the nautilus draws water into and out of the living chamber with the hyponome, which makes use of jet propulsion. When water is inside the chamber, the siphuncle extracts salt from it and diffuses it into the blood. When water is pumped out, the animal adjusts its buoyancy with the gas contained in the chamber. Buoyancy can be controlled by the osmotical pumping of gas and fluid into or from the camerae along the siphuncles. The control of buoyancy in this manner limits the nautilus; they cannot operate under extreme hydrostatic pressures. The hyponome is the organ used by cephalopods for locomotion. ... This article should be split into multiple articles accessible from a disambiguation page. ... A magnified crystal of a salt (halite/sodium chloride) Salt covering the floor of Bad Water in Death Valley, CA, the lowest point in the US. A salt, in chemistry, is any ionic compound composed of cations (positively charged ions) and anions (negative ions) so that the product is neutral... In physics, buoyancy is the upward force on an object produced by the surrounding fluid (i. ... Osmosis is the net movement of a solvent across a semipermeable membrane from a region of high solvent potential to an area of low solvent potential. ... Hydrostatic pressure is the pressure exerted by a fluid due to its weight. ...


The animal can also crawl on land or on the seabed. The seabed (also sea floor, seafloor, or ocean floor) is the bottom of the ocean. ...


In the wild, nautiluses usually inhabit depths of about 300 m, rising to around 100 m at night for feeding, mating and egg laying. The shell of the nautilus cannot withstand depths greater than approximately 800 m. In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. ...

Nautilus tentacles
Nautilus tentacles

Image File history File linksMetadata Download high-resolution version (948x936, 200 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Nautilus User:TheMadBaron Metadata This file contains additional information, probably added from the digital camera or scanner used... Image File history File linksMetadata Download high-resolution version (948x936, 200 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Nautilus User:TheMadBaron Metadata This file contains additional information, probably added from the digital camera or scanner used...

Diet and sensory system

Nautiluses are predators and feed mainly on shrimp, small fish and crustaceans, which are captured by the tentacles. However, due to the very little energy they devote to swimming, they need only eat once a month. Unlike other cephalopods, they do not have good vision; their eye structure is highly developed but lacks a solid lens. They have a simple "pinhole" lens through which water can pass. Instead of vision, the animal is thought to use olfaction as the primary sensory means during foraging, locating or identifying potential mates. This snapping turtle is trying to make a meal of a Canada goose, but the goose is too wary. ... Superfamilies Alpheoidea Atyoidea Bresilioidea Campylonotoidea Crangonoidea Galatheacaridoidea Nematocarcinoidea Oplophoroidea Palaemonoidea Pandaloidea Pasiphaeoidea Procaridoidea Processoidea Psalidopodoidea Stylodactyloidea Shrimp are swimming, decapod crustaceans classified in the infraorder Caridea, found widely around the world in both fresh and salt water. ... A giant grouper at the Georgia Aquarium Fish are aquatic vertebrates that are typically cold-blooded; covered with scales, and equipped with two sets of paired fins and several unpaired fins. ... Classes & Subclasses Branchiopoda Phyllopoda Sarsostraca Remipedia Cephalocarida Maxillopoda Thecostraca Tantulocarida Branchiura Pentastomida Mystacocarida Copepoda Ostracoda Myodocopa Podocopa Malacostraca Phyllocarida Hoplocarida Eumalacostraca The crustaceans (Crustacea) are a large group of arthropods, comprising approximately 52,000 described species [1], and are usually treated as a subphylum [2].They include various familiar animals... Look up lens in Wiktionary, the free dictionary. ... Principle of a pinhole camera. ... Young boy smelling a flower Olfaction, which is also known as Olfactics is the sense of smell, and the detection of chemicals dissolved in air. ... Foraging just means looking for food (or, metaphorically, anything else). ...


Reproduction and lifespan

Nautiluses are sexually dimorphic and reproduce by laying eggs. Attached to rocks in shallow waters, the eggs take twelve months to develop before hatching out at around 30 mm long. Females spawn once per year and regenerate their gonads, making nautiluses the only cephalopods to present iteroparity or polycyclic spawning. The lifespan of nautiluses is about 20 years, which is exceptionally long for a cephalopod. Female (left) and male Common Pheasant, illustrating the dramatic difference in both color and size between the sexes Sexual dimorphism is the systematic difference in form between individuals of different sex in the same species. ... In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. ... The gonad is the organ that makes gametes. ... Iteroparity (adjective iteroparous) describes a form of reproduction. ... Biological reproduction is the biological process by which new individual organisms are produced. ...


Classification

The genus Nautilus contains six extant species and several extinct species. // Prepleistocene extinctions A large number of historical orders are extinct, for example dinosaurs, pterosaurs and ammonites. ...

Species Allonautilus perforatus Allonautilus scrobiculatus (type) The genus Allonautilus contains two species of nautiluses, which differ significantly in terms of morphology from those placed in the sister taxon Nautilus. ... Binomial name Allonautilus perforatus Conrad, 1849 Allonautilus perforatus is a species of nautilus native to the waters around Bali, Indonesia. ... This page meets Wikipedias criteria for speedy deletion. ... Species Nautilus belauensis †Nautilus clarkanus †Nautilus cookanum Nautilus macromphalus Nautilus pompilius (type) Nautilus pompilius pompilius Nautilus pompilius suluensis †Nautilus praepompilius Nautilus stenomphalus The genus Nautilus contains four species of nautiluses, which differ significantly in terms of morphology from those placed in the sister taxon Allonautilus. ... Binomial name Nautilus belauensis Saunders, 1981 The Palau Nautilus (Nautilus belauensis) is a species of nautilus native to the waters around the Pacific island nation of Palau. ... Binomial name †Nautilus clarkanus Hall, 1858 Nautilus clarkanus is an extinct species of nautilus. ... Binomial name †Nautilus cookanum Whitfield, 1892 Nautilus cookanum is an extinct species of nautilus. ... Binomial name Nautilus macromphalus Sowerby, 1848 The Bellybutton Nautilus (Nautilus macromphalus) is a species of nautilus native to the waters around New Caledonia. ... Nautilus Pompilius (Cyrillic: Наутилиус Помпилиус), frequently abbreviated as Nau, was a legendary Russian rock band active between 1987 and 1997. ... Type specimens When a new species is discovered, more important than creating a new and unique name for the species is developing a reasonably detailed description. ... Binomial name Nautilus pompilius Linnaeus, 1758 Subspecies Nautilus pompilius pompilius Nautilus pompilius suluensis The Chambered Nautilus (Nautilus pompilius) is the most well known species of nautilus. ... Binomial name Nautilus pompilius Linnaeus, 1758 Subspecies Nautilus pompilius pompilius Nautilus pompilius suluensis The Chambered Nautilus (Nautilus pompilius) is the most well known species of nautilus. ... Binomial name †Nautilus praepompilius Shimansky, 1957 Nautilus praepompilius is an extinct species of nautilus. ... Binomial name Nautilus stenomphalus Sowerby, 1848 The White-patch Nautilus (Nautilus stenomphalus) is a species of nautilus native to the Great Barrier Reef. ...

Dubious or uncertain taxa

Binomial name and author citation Current systematic status Type locality Type repository
Nautilus alumnus Iredale, 1944 Species dubium [fide Saunders (1987:49)] Queensland, Australia Not designated [fide Saunders (1987:49)]
Nautilus ambiguus Sowerby, 1848 Species dubium [fide Saunders (1987:48)] Not designated Unresolved
Nautilus beccarii Linne, 1758 Non-cephalopod; Foraminifera [fide Frizzell and Keen (1949:106)]
Nautilus calcar Linne, 1758  ?Non-cephalopod; Foraminifera Lenticulina Adriatic Sea Unresolved; Linnean Society of London?
Nautilus crispus Linne, 1758 Undetermined Mediterranean Sea Unresolved; Linnean Society of London?
Nautilus crista Linne, 1758 Non-cephalopod; Turbo [fide Dodge (1953:14)]
Nautilus fascia Linne, 1758 Undetermined Adriatic Sea Unresolved; Linnean Society of London?
Nautilus granum Linne, 1758 Undetermined Mediterranean Sea Unresolved; Linnean Society of London?
Nautilus lacustris Lightfoot, 1786 Non-cephalopod; Helix [fide Dillwyn (1817:339)]
Nautilus legumen Linne, 1758 Undetermined Adriatic Sea Unresolved; Linnean Society of London?
Nautilus micrombilicatus Joubin, 1888 Nomen nudum
Nautilus obliquus Linne, 1758 Undetermined Adriatic Sea Unresolved; Linnean Society of London?
Nautilus pompilius marginalis Willey, 1896 Species dubium [fide Saunders (1987:50)] New Guinea Unresolved
Nautilus pompilius moretoni Willey, 1896 Species dubium [fide Saunders (1987:49)] New Guinea Unresolved
Nautilus pompilius perforatus Willey, 1896 Species dubium [fide Saunders (1987:49)] New Guinea Unresolved
Nautilus radicula Linne, 1758  ?Non-cephalopod; Foraminifera Nodosaria Adriatic Sea Unresolved; Linnean Society of London?
Nautilus raphanistrum Linne, 1758 Undetermined Mediterranean Sea Unresolved; Linnean Society of London?
Nautilus raphanus Linne, 1758 Undetermined Adriatic Sea Unresolved; Linnean Society of London?
Nautilus semi-lituus Linne, 1758 Undetermined Liburni, Adriatic Sea Unresolved; Linnean Society of London?
Nautilus sipunculus Linne, 1758 Undetermined "freto Siculo" Unresolved; Linnean Society of London?
Nautilus texturatus Gould, 1857 Nomen nudum
Octopodia nautilus Schneider, 1784 Rejected specific name [fide Opinion 233, ICZN (1954:278)]

Capital Brisbane Government Constitutional monarchy Governor Quentin Bryce Premier Peter Beattie (ALP) Federal representation  - House seats 28  - Senate seats 12 Gross State Product (2004-05)  - Product ($m)  $158,506 (3rd)  - Product per capita  $40,170/person (6th) Population (End of September 2006)  - Population  4,070,400 (3rd)  - Density  2. ... Orders Allogromiida Carterinida Fusulinida - extinct Globigerinida Involutinida - extinct Lagenida Miliolida Robertinida Rotaliida Silicoloculinida Spirillinida Textulariida incertae sedis    Xenophyophorea    Reticulomyxa The Foraminifera, or forams for short, are a large group of amoeboid protists with reticulating pseudopods, fine strands that branch and merge to form a dynamic net. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... Composite satellite image of the Mediterranean Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... Air foil bearing-supported turbocharger cutaway made by Mohawk Innovative Technology Inc. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... Composite satellite image of the Mediterranean Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... Species See text. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... This page is a candidate for speedy deletion, because: it is patent nonsense. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... Composite satellite image of the Mediterranean Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... The Liburnians were the ancient inhabitants of Liburnia. ... A satellite image of the Adriatic Sea. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... The Linnean Society of London is the worlds premier society for the study and dissemination of taxonomy. ... This page is a candidate for speedy deletion, because: it is patent nonsense. ...

Distribution

Nautiluses are only found in the Indo-Pacific, from 30° N to 30° S latitude and 90° to 185° W longitude. They inhabit the deep slopes of coral reefs. The Indo-Pacific is the aggregate of the Indian Ocean, Pacific Ocean, and the minor seas between the two in the general area of Indonesia. ... Some of the biodiversity of a coral reef. ...


Natural history

Fossil records indicate that nautiluses have not evolved much during the last 500 million years, and nautiloids were much more extensive and varied 200 million years ago. Many were initially straight-shelled, as in the extinct genus Lituites. They developed in the Cambrian period and became a significant sea predator in the Ordovician period. Certain species reached over 2.5 meters in size. The other cephalopod subclass, Coleoidea, diverged from the Nautilidae long ago and the nautilus has remained relatively unchanged since. Extinct relatives of the nautilus include ammonites, such as the baculites and goniatites. Three small ammonite fossils, each approximately 1. ... Species all extinct Lituites is a genus of one of the most primitive known extinct cephalopods, which originated in the Ordovician period, around 460 million years ago. ... The Cambrian is a major division of the geologic timescale that begins about 542 ± 1. ... This snapping turtle is trying to make a meal of a Canada goose, but the goose is too wary. ... The Ordovician period is the second of the six (seven in North America) periods of the Paleozoic era. ... Orders Aulacocerida (extinct) Hematitida  (extinct) Phragmoteuthida  (extinct) Belemnitida  (extinct) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Subclass Coleoidea is the grouping of cephalopods containing all the primarily soft-bodied creatures. ... The Dodo, shown here in illustration, is an often-cited[1] example of modern extinction. ... For other uses, see Ammonite (disambiguation). ... Species all extinct Baculites (walking stick rock) is a genus of extinct marine animals in the phylum Mollusca and class Cephalopoda. ... Families all extinct Goniatites are an extinct group of ammonite, which are related to the nautiloids. ...


See also

The nautilus shell features prominently in the official emblem of New Caledonia.
The nautilus shell features prominently in the official emblem of New Caledonia.

Image File history File links NC_Armoires. ... Image File history File links NC_Armoires. ... The giant squid (Architethis sp. ... Binomial name Nautilus pompilius Linnaeus, 1758 Subspecies Nautilus pompilius pompilius Linnaeus, 1758 Nautilus pompilius suluensis Habe & Okutani, 1988 Synonyms Nautilus repertus Iredale, 1944 The Chambered Nautilus (Nautilus pompilius) is the best known species of nautilus. ... Oliver Wendell Holmes Sr. ... This article or section does not cite its references or sources. ...

References

External links


  Results from FactBites:
 
History of USS Nautilus SSN571 (537 words)
Construction of NAUTILUS was made possible by the successful development of a nuclear propulsion plant by a group of scientists and engineers at the Naval Reactors Branch of the Atomic Energy Commission, under the leadership of Captain Hyman G. Rickover, USN.
After nearly 18 months of construction, NAUTILUS was launched on January 21, 1954 with First Lady Mamie Eisenhower breaking the traditional bottle of champagne across NAUTILUS' bow as she slid down the ways into the Thames River.
In recognition of her pioneering role in the practical use of nuclear power, NAUTILUS was designated a National Historic Landmark by the Secretary of the Interior on May 20, 1982.
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