Bellybutton Nautilus

Description: Deutsch: Nautilus, Modell, Humboldtmuseum, Berlin English: Model of a Nautilus. Date: 5 March 2008. Source: Self-photographed. Author: Gunnar Ries Amphibol. Permission(Reusing this file): You must give the original author credit. If you use my pictures outside the wiki projects, please let me know.

Description: couple of Nautilus macromphalus, night dive, 15 meters, Lifou, Sandal wood bay, New Caledonia. Date: 18 July 2007. Source: Own work. Author: Pierre Sylvie.

Description: Nautilus macromphalus, night dive, 15 meters, Lifou, New Caledonia. Date:. Source: Own work. Author: Pujolle.

Description: Nautilus macromphalus (Sowerby 1848) night dive, 15 meter, Lifou New Caledonia. Date: 18 July 2007. Source: Own work. Author: Pujolle.

Description: English: The cephalopod Nautilus macromphalus (Sowerby 1848) photographed in night dive, 15 meters, Lifou (New Caledonia). Date: 21 October 2018. Source: Original file Image taken from Wikimedia Commons. Author: Pujolle.

Description: Nautilus macromphalus Sowerby, 1849 - bellybutton nautilus shell (BMSM 73299, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) This shell is from one of only 6 living species of an entire group of molluscs - the nautiloids. Nautiloids are basically a squid in a shell. Most modern squids do not have an external hard shell, but the bellybutton nautilus does. The shell is composed of aragonite (CaCO3 - calcium carbonate). In the fossil record, most nautiloids had a long, straight, slightly tapering shell. Some fossil forms had slightly curved or open coiled or tightly coiled shells. The modern bellybutton nautilus shell is tightly coiled. All nautiloid shells are/were hollow, but they were separated into many chambers by curvilinear walls. A tube of tissue called the siphuncle runs through the shell's chambers - it passively pumps gas into or out of the chambers. Increased gas content within the shell's chambers results in a low-buoyancy body, and the organism rises in the water column. As water is added to the chambers by the siphuncle, the organism's body becomes heavier and it sinks. These changes do not occur quickly. Classification: Animalia, Mollusca, Cephalopoda, Nautiloidea, Nautilidae Locality: Nehoue Bay, northwestern New Caledonia, southwestern Pacific Basin More info. at: en.wikipedia.org/wiki/Nautilus_macromphalus and en.wikipedia.org/wiki/Chambered_nautilus and en.wikipedia.org/wiki/Siphuncle. Date: 2 January 2016, 13:37. Source: Nautilus macromphalus (bellybutton nautilus) (Nehoue Bay, New Caledonia). Author: James St. John.

Description: English: Sagittal section of the shell of the “primitive” extant cephalopod species Nautilus macromphalus. The contrast of the photograph was artificially enhanced in order to show the iridescence (structural colors) of the mother of pearl layer that is making up the internal surface of the shell. Deutsch: Sagittalschnitt durch das Gehäuse der „primitven“ rezenten Kopffüßerart Nautilus macromphalus. Der Bildkontrast wurde künstlich verstärkt um das Irisieren (die Strukturfarben) des Perlmutts, das die Innenfläche des Gehäuses überzieht, besser sichtbar zu machen. Date: 23 August 2016, 06:44:42. Source: Own work. Author: Sérgio Valle Duarte Wikidata has entry Q16269994 with data related to this item.. Other versions: A Nautilus macromphalus, linnaeus shell outside.

Summary.mw-parser-output table.commons-file-information-table,.mw-parser-output.fileinfotpl-type-information{border:1px solid #a2a9b1;background-color:#f8f9fa;padding:5px;font-size:95%;border-spacing:2px;box-sizing:border-box;margin:0;width:100%}.mw-parser-output table.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{vertical-align:top}.mw-parser-output table.commons-file-information-table>tbody>tr>td,.mw-parser-output table.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:4px}.mw-parser-output.fileinfo-paramfield{background:#ccf;text-align:right;padding-right:0.4em;width:15%;font-weight:bold}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{border-top:0;padding-top:0;margin-top:-8px}@media only screen and (max-width:719px){.mw-parser-output table.commons-file-information-table,.mw-parser-output.commons-file-information-table.fileinfotpl-type-information{border-spacing:0;padding:0;word-break:break-word;width:100%!important}.mw-parser-output.commons-file-information-table>tbody,.mw-parser-output.fileinfotpl-type-information>tbody{display:block}.mw-parser-output.commons-file-information-table>tbody>tr>td,.mw-parser-output.commons-file-information-table>tbody>tr>th,.mw-parser-output.fileinfotpl-type-information>tbody>tr>td,.mw-parser-output.fileinfotpl-type-information>tbody>tr>th{padding:0.2em 0.4em;text-align:left;text-align:start}.mw-parser-output.commons-file-information-table>tbody>tr,.mw-parser-output.fileinfotpl-type-information>tbody>tr{display:flex;flex-direction:column}.mw-parser-output.commons-file-information-table+table.commons-file-information-table,.mw-parser-output.commons-file-information-table+div.commons-file-information-table>table{margin-top:-1px}.mw-parser-output.fileinfo-paramfield{box-sizing:border-box;flex:1 0 100%;width:100%}} Description: English: External surface of the shell of the “primitive” extant cephalopod Nautilus (probably Nautilus vanuatuensis). Deutsch: Außenfläche des Gehäuses der „primitiven“ rezenten Kopffüßerart Nautilus macromphalus LINNAEUS. Date: 23 August 2016, 06:44:47. Source: Own work. Author: Sérgio Valle Duarte Wikidata has entry Sergio Valle Duarte (Q16269994) with data related to this item.. Other versions: A Nautilus macromphalus shell inside.