Nautilus pompilius, commonly called the Chambered Nautilus, is the most common Nautilus and the only Cephalopod with true external shell.
Nautilus pompilius Linnaeus, 1758
🗒 Synonyms
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🗒 Common Names
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📚 Overview
SubSpecies Varieties Races
Nautilus pompilius pompilius Linnaeus, 1758 - called the Emperor Nautilus, this larger subspecies is found in the Andaman Sea east to Fiji and southern Japan south to the Great Barrier Reef.
Nautilus pompilius suluensis Habe and Okutani, 1988 - this smaller subspecies is restricted to the Sulu Sea in the southwestern Philippines.
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📚 Nomenclature and Classification
📚 Natural History
Reproduction
Sexual maturity: At 15-20 years of age.
Fertlisation: Internal. 4 tentacles of male transfer spermatophore to female's mantle wall where it disintegrates to release sperms.
Eggs: Oblong in shape and about 1.5 inches in length (Brusca and Brusca 1990, Dybas 1994).
Morphology
Smooth thin shell with small umbilicus, exogastric spirals, with many chambers varying in number depending on the age of the mollusc - about 30 in adults, a siphuncle releasing gas to keep the nautilus in upright position, a tough hood, 90 small suckerless tentacles below the hood, a funnel containing two separate lobes, eyes with no cornea or lens, and variable colouration which generally comprises irregularly radiating brown stripes that extend from umbilicus to venter. Also, shells show countershading with lighter bottoms and darker tops.
Behaviour
Countershading of shell helps this species escape from predators - when seen from above, it blends with the light, and when seen from below, it blends with the darkness of the sea.
With primitive pin-hole camera-like eyes, this mollusc depends on chemotaxis through a pair of rhinopores and olfaction to hunt prey.
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📚 Habitat and Distribution
General Habitat
Marine: Usually near the bottom of shores and coral reefs, upto a depth of 500m, except in the night when they rise closer to the surface.
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📚 Occurrence
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📚 Demography and Conservation
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📚 Uses and Management
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📚 Information Listing
References
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
- Rosenberg, G. (2013). Nautilus pompilius Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
Information Listing > References
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
- Rosenberg, G. (2013). Nautilus pompilius Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- Rosenberg, G. (2013). <i>Nautilus pompilius</i> Linnaeus, 1758. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216384 on 2013-01-27.
- 'Protected Species of Mollusca'. Malacology Division, Zoological Survey of India, Kolkatta, West Bengal, India. URL: http://zsi.gov.in/publications/handout/mollusca.pdf.
- Chambered nautilus. (2013, January 26). In Wikipedia, The Free Encyclopedia. Retrieved 15:30, January 27, 2013, from http://en.wikipedia.org/w/index.php?title=Chambered_nautilus&oldid=535063809.
No Data
🐾 Taxonomy
📊 Temporal Distribution
📷 Related Observations