Chambered Nautiluses

Nautilus belauensis, head-on view showing the hyponome opening through which water is expelled to propel the animal backwardsFrom Wikipedia

Coast, Kenya

Summary[edit] Description: Nautilus belauensis Saunders, 1981 - Palau nautilus shell (BMSM 73301, 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 Palau 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 Palau 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: Koror Island, Palau, western Pacific Basin More info. at: en.wikipedia.org/wiki/Nautilus_belauensis and en.wikipedia.org/wiki/Chambered_nautilus and en.wikipedia.org/wiki/Siphuncle. Date: 2 January 2016, 13:40. Source: Nautilus belauensis (Palau nautilus) (Koror, Palau). Author: James St. John.

Nautilus stenomphalus Sowerby, 1849

Summary[edit] Description: English: Chambered nautilus (Nautilus pompilius) in Cornwall, England. Magyar: Csigáspolip (Nautilus pompilius) az angliai Cornwall-ban. Date: 23 July 2013. Source: kindly granted by the author. Author: Emőke Dénes. Permission(Reusing this file): This file was created by Emőke Dénes and uploaded by DenesFeri. : This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license. :. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/4.0 CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue. : This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page. Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by an OTRS member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2017083110036563. If you have questions about the archived correspondence, please use the OTRS noticeboard. Ticket link: https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2017083110036563..

Summary[edit] Description: English: External surface of the shell of the “primitive” extant cephalopod species Nautilus macromphalus LINNAEUS 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 Q16269994 with data related to this item.. Other versions: A Nautilus macromphalus shell inside.

Palau Nautilus (Nautilus belauensis), side view (Palau, Micronesia)From Wikipedia

Summary[edit] Description: Shells of Marine Mollusca, including abalone, Nautilus belauensis and a fossil shell. (Also, a sand dollar, which is not in the phylum mollusca). Could you guess which one is fossil?. Date: 2007. Source: Own work. Author: Brocken Inaglory.

Summary[edit] Description: Nautilus stenomphalus Sowerby, 1849 - white-patch nautilus shell (BMSM 67290, 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 white-patch 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 white-patch 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: unrecorded locality around Mindanao Island, southern Philippines More info. at: en.wikipedia.org/wiki/Nautilus_stenomphalus and en.wikipedia.org/wiki/Chambered_nautilus and en.wikipedia.org/wiki/Siphuncle. Date: 3 January 2016, 16:18. Source: Nautilus stenomphalus (white-patch nautilus) (Mindanao, Philippines) 2. Author: James St. John.

Summary[edit] Description: Nautilus, photographed at Siam Ocean World aquarium, Bangkok. Date: 20 October 2006. Source: Own work. Author: User:TheMadBaron. Permission (Reusing this file): Public domainPublic domainfalsefalse. : This work has been released into the public domain by its author, TheMadBaron at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: TheMadBaron grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse.

Summary[edit] 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.

Palau nautilus (Nautilus belauensis), with human diver for scale (Palau, Micronesia)From Wikipedia

taken at the MBL sept 1997. Plexiglass tank with painted background.

Summary[edit] Description: Deutsch: Nautilus, Palau. Date: 7 February 2012, 00:43:41. Source: Own work. Author: Manuae.

Summary[edit] Description: English: The colorful illustration of Nautilus stenomphalus G.B. Sowerby II, 1849[1], taken form the book Systematisches Conchylien-Cabinet (Nürnberg :Bauer und Raspe,1837-)[2]. According the Forum Francophone des Collectionneurs de Coquillages Actuels It is distinguished from other nautiluses by a tiny umbilical shell [3] (as illustrated). Date: 28 October 2018. Source: Original file illustration taken from Biodiversity Heritage Library. Author: Martini, Friedrich Heinrich Wilhelm Chemnitz, Johann Hieronymus.

Summary[edit] Description: Nautilus (Henry Doorly Zoo). Date: 2008. Source: Own work. Author: WingedWolfPsion.

Nautilus macromphalus Sowerby, 1848

Palau Nautilus (Nautilus belauensis), viewed from above (Palau, Micronesia)From Wikipedia

A manual of the Mollusca :.London :Virtue & Co.,1868..biodiversitylibrary.org/page/32571360

Summary[edit] Description: Nautilus stenomphalus Sowerby, 1849 - white-patch nautilus shell (BMSM 67290, 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 white-patch 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 white-patch 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: unrecorded locality around Mindanao Island, southern Philippines More info. at: en.wikipedia.org/wiki/Nautilus_stenomphalus and en.wikipedia.org/wiki/Chambered_nautilus and en.wikipedia.org/wiki/Siphuncle. Date: 2 January 2016, 13:37. Source: Nautilus stenomphalus (white-patch nautilus) (Mindanao, Philippines) 1. Author: James St. John.

Summary[edit] Description: Deutsch: Perlboot - Nautilus im Zoo Leipzig. Date: 22 October 2008. Source: Own work. Author: TOMMES-WIKI.

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

Palau Nautilus (Nautilus belauensis), side view (Palau, Micronesia)From Wikipedia