Facts about Ammonites, an extinct prehistoric animal

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Dinosaur Jungle   >   Other Prehistoric Animals   >   Ammonites

Ammonites



Ammonite Fossil
Click here for more Ammonite Pictures

Scientific Classification
  Kingdom Animalia
  Phylum Mollusca
  Class Cephalopoda
  Subclass Ammonoidea
Ammonites are an extinct group of cephalopod molluscs that lived in marine environments. They first appeared in the Late Silurian or Early Devonian (about 400 million years ago), and went extinct at the end of the Cretaceous period (about 65 million years ago), during the Cretaceous-Tertiary mass extinction. Although they outwardly physically resemble the modern Nautilus, Ammonites are actually believed to be more closely related to cuttlefish, octopi, and squid.

Ammonite fossils are often (but not always) a distinctive flattened spiral coil with visible ribs, although there are species with unusual coil shapes, partially coiled shells, and even uncoiled shells. Most Ammonites are quite small, perhaps 9 inches (23 centimeters) or less in diameter - there are however some larger types, for example Parapuzosia seppenradensis which is found in Cretaceous rocks from Germany is sometimes upto 6½ feet (2 meters) in diameter,

Fossilized ammonites preserved in rock:
Fossilized ammonites preserved in rock

Ammonite fossils have been known since ancient times:
  • The Roman author, Pliny the Elder (23 CE to 79 CE) called the fossils, the "horns of Ammon", because he thought that they resembled the ram's horns which the Egyptian god Ammon was depicted with.

  • In medieval times, Ammonites were often thought to be petrified snakes, and were often called "snake stones" or "serpent stones". The supposed petrification was usually ascribed to the actions of saints such as Saint Patrick (who was said to have driven the snakes out of Ireland).

  • In India, Ammonites were sometimes regarded as symbols of the god Vishnu, and were kept in temples.
Today, modern scientists often use Ammonites and Amminoids as "index fossils" (fossils which are used to help date the rocks that they are found in), particularly for Mesozoic Era rocks. This is possible because these fossils are relatively abundant in rocks, are widely distributed, and because different species evolved and went extinct in rapid succession - thus the presence of a particular species is indicative of rocks being formed in a particular time period.

Ammonites Timeline:



Ammonites were cephalopod molluscs that lived in the seas between 400 and 65 million years ago

Ammonites were cephalopod molluscs that lived in the seas between 400 and 65 million years ago


Related Information & Resources


See Also

Ammonite Books


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Ammonite
By Nicola Griffith

Griffith, Nicola
Released: April 30th, 2002
Paperback (416 pages)

Ammonite
List Price: $17.00*
Lowest New Price: $14.29*
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Description:
Ammonite
  • Manufacturer: Del Rey
  • Brand: Griffith, Nicola
  • ISBN: 0345452380
  • EAN: 9780345452382
  • PartNumber: 9780345452382
Details:
  • Paperback
  • Edition: Reprint
  • Number of Pages: 416
  • Author: Nicola Griffith
  • Publication Date: April 30th, 2002
  • Release Date: April 30th, 2002
Physical Description:
  • Size: 8.25 Inches by 5.5 Inches by 0.9 Inches
  • Weight: 1.05 Pounds
Click here for more information
Ammonites
By Neale Monks

Brand: Smithsonian Books
Paperback (176 pages)

Ammonites
List Price: $24.95*
Lowest New Price: $19.97*
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Description:
Ammonites
  • Manufacturer: Smithsonian Books
  • Brand: Brand: Smithsonian Books
  • ISBNs: 9781588340474, 1588340473
  • EAN: 9781588340474
  • PartNumber: unknown
Details:
  • Paperback
  • Edition: First Printing
  • Number of Pages: 176
  • Authors: Neale Monks, Philip Palmer
Physical Description:
  • Size: 9.21 Inches by 6.05 Inches by 0.4 Inches
  • Weight: 0.78 Pounds
Features:
  • Used Book in Good Condition
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Ammonites and Leaping Fish: A Life in Time
By Penelope Lively

Penguin
Released: August 7th, 2014
Paperback

Ammonites and Leaping Fish: A Life in Time
Lowest New Price: $15.33*
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Description:
Ammonites and Leaping Fish: A Life in Time
  • Manufacturer: Penguin
  • Brand: Penguin
  • ISBN: 0241966981
  • EAN: 9780241966983
  • PartNumber: 9780241966983
Details:
  • Paperback
  • Author: Penelope Lively
  • Publication Date: August 7th, 2014
  • Release Date: August 7th, 2014
Physical Description:
  • Size: 7.79526 Inches by 5.07873 Inches by 0.59055 Inches
  • Weight: 0.3747858454 Pounds
Features:
  • PENGUIN GROUP
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Ammonite. by Nicola Griffith
By Nicola Griffith

Gollancz
Released: September 1st, 2012
Paperback (416 pages)

Ammonite. by Nicola Griffith
Lowest New Price: $17.30*
Usually ships within 6 to 10 days.*
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Description:
Ammonite. by Nicola Griffith
  • Manufacturer: Gollancz
  • ISBN: 0575118237
  • EAN: 9780575118232
  • PartNumber: unknown
Details:
  • Paperback
  • Number of Pages: 416
  • Author: Nicola Griffith
  • Publication Date: September 1st, 2012
  • Release Date: September 1st, 2012
Physical Description:
  • Size: 5.43306 Inches by 7.95274 Inches by 1.10236 Inches
  • Weight: 0.64374980504 Pounds
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Dancing Fish and Ammonites: A Memoir
By Penelope Lively

Penguin Books
Released: June 23rd, 2015
Paperback (240 pages)

Dancing Fish and Ammonites: A Memoir
List Price: $17.00*
Lowest New Price: $6.76*
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Description:
Dancing Fish and Ammonites: A Memoir
  • Manufacturer: Penguin Books
  • ISBN: 014312627X
  • EAN: 9780143126270
  • PartNumber: unknown
Details:
  • Paperback
  • Edition: Reprint
  • Number of Pages: 240
  • Author: Penelope Lively
  • Publication Date: June 23rd, 2015
  • Release Date: June 23rd, 2015
Physical Description:
  • Size: 7.7 Inches by 0.7 Inches by 5.0 Inches
  • Weight: 0.4 Pounds
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52 Assignments Instagram Photography
By Adam Juniper

Ammonite Press
Released: March 12th, 2020
Hardcover (128 pages)

52 Assignments Instagram Photography
Lowest New Price: $17.95*
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Description:
52 Assignments Instagram Photography
  • Manufacturer: Ammonite Press
  • Brand: Ammonite Press
  • ISBN: 1781453764
  • EAN: 9781781453766
Details:
  • Hardcover
  • Edition: None
  • Number of Pages: 128
  • Author: Adam Juniper
  • Publication Date: March 12th, 2020
  • Release Date: March 12th, 2020
Physical Description:
  • Size: 8.25 Inches by 5.5 Inches by 0.8 Inches
  • Weight: 0.9 Pounds
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52 Assignments: Street Photography
By Brian Lloyd Duckett

Ammonite Press
Released: April 1st, 2019
Hardcover (128 pages)

52 Assignments: Street Photography
List Price: $17.95*
Lowest New Price: $16.38*
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Description:
52 Assignments: Street Photography
  • Manufacturer: Ammonite Press
  • Brand: Ammonite Press
  • ISBN: 1781453527
  • EAN: 9781781453520
  • PartNumber: 50 full-colour photographs, 10 illustrat
Details:
  • Hardcover
  • Edition: None
  • Number of Pages: 128
  • Author: Brian Lloyd Duckett
  • Publication Date: April 1st, 2019
  • Release Date: April 1st, 2019
Physical Description:
  • Size: 8.25 Inches by 5.5 Inches by 0.7 Inches
  • Weight: 0.95 Pounds
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Blank Journal - Fibonacci Ammonite Shell
By Gem Books

CreateSpace Independent Publishing Platform
Released: June 9th, 2018
Paperback (150 pages)

Blank Journal - Fibonacci Ammonite Shell
Lowest New Price: $6.99*
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Description:
Blank Journal - Fibonacci Ammonite Shell
  • Manufacturer: CreateSpace Independent Publishing Platform
  • ISBN: 1720952787
  • EAN: 9781720952787
Details:
  • Paperback
  • Number of Pages: 150
  • Author: Gem Books
  • Publication Date: June 9th, 2018
  • Release Date: June 9th, 2018
Physical Description:
  • Size: 9.0 Inches by 6.0 Inches by 0.34 Inches
  • Weight: 0.47 Pounds
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Mates for Life: Devoted Couples from the Animal Kingdom
By Ammonite Press

Brand: Ammonite Press
Released: February 1st, 2011
Paperback (96 pages)

Mates for Life: Devoted Couples from the Animal Kingdom
List Price: $11.95*
Lowest New Price: $6.22*
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Description:
Mates for Life: Devoted Couples from the Animal Kingdom
  • Manufacturer: Ammonite Press
  • Brand: Brand: Ammonite Press
  • ISBN: 1907708022
  • EAN: 9781907708022
  • PartNumber: 60 colour photographs
Details:
  • Paperback
  • Number of Pages: 96
  • Author: Ammonite Press
  • Publication Date: February 1st, 2011
  • Release Date: February 1st, 2011
Physical Description:
  • Size: 6.25 Inches by 6.5 Inches by 0.5 Inches
  • Weight: 0.5 Pounds
Features:
  • Used Book in Good Condition
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A Corpus of Ammonite Inscriptions
By Walter E. Aufrecht

Eisenbrauns
Released: June 11th, 2019
Hardcover (648 pages)

A Corpus of Ammonite Inscriptions
Lowest New Price: $119.50*
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Description:
A Corpus of Ammonite Inscriptions
  • Manufacturer: Eisenbrauns
  • ISBN: 1575063441
  • EAN: 9781575063447
  • PartNumber: unknown
Details:
  • Hardcover
  • Edition: Second
  • Number of Pages: 648
  • Author: Walter E. Aufrecht
  • Publication Date: June 11th, 2019
  • Release Date: June 11th, 2019
Physical Description:
  • Size: 10.0 Inches by 7.0 Inches by 2.05 Inches
  • Weight: 2.85057704766 Pounds
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