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CLASSIC 'DEVIL'S TOENAIL' (Gryphaea arcuata) - 190 million years old - Gloucestershire

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JURASSIC OYSTER
or 'DEVIL'S TOENAIL'

 
190 million years old
  
Hock Cliff, Fretherne, Gloucestershire
  
The extinct bivalved mollusc Gryphaea arcuata is a well-known and distinctive fossil and an ancestor of the modern oyster.  It has one shell, or valve, much larger than the other and strongly curved as an adaptation to living on a muddy sea floor.  Its characteristic shape has led to it being called the 'Devil's toenail' in folklore.
  
This is a lovely example of this fossil. Both of the valves are present. It has been meticulously prepared by a skilled palaeontologist in his workshop using air abrasive machinery. There is no damage - the small flat area is where the shell was attached to a hard substrate - probably another shell.
  
See also the following book which can be purchased here (£6)  Formed Stones, Folklore and Fossils 
  
Click on a picture for a larger image

Size: 6.5 x 4 x 3 centimetres
Weight: 110 grams

PRICE: £12.00
CLASSIC 'DEVIL'S TOENAIL'  (Gryphaea arcuata)  -  190 million years old  -  Gloucestershire
CLASSIC 'DEVIL'S TOENAIL'  (Gryphaea arcuata)  -  190 million years old  -  Gloucestershire CLASSIC 'DEVIL'S TOENAIL'  (Gryphaea arcuata)  -  190 million years old  -  Gloucestershire CLASSIC 'DEVIL'S TOENAIL'  (Gryphaea arcuata)  -  190 million years old  -  Gloucestershire CLASSIC 'DEVIL'S TOENAIL'  (Gryphaea arcuata)  -  190 million years old  -  Gloucestershire