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Notopocorystes (McCoy, 1849)

 

This genus is best known from the Albian Gault Clay of SE England, from which it can be collected with a degree of frequency.  A very small number of specimens have been collected from the Grey Chalk, of SE England.  Notopocorystes possesses a longitudinally elongate carapace (longer than broad), broadest towards the anterior, slightly tapered towards the posterior, and ornamented with lateral spines. 

 

 A  B

1).  Notopocorystes - well preserved specimens from the Grey Chalk; (A) Notopocorystes normani - a complete carapace retaining the right cheliped - an exceptionally preserved specimen (x2.0, Dover, BMNH (British Museum (Natural History) London) 44346); (B) Notopocorystes sp. - a complete but slightly distorted carapace (x3.3, Sussex?, Potter Collection, Booth Museum, BMB 011208, by kind permission of John Cooper).  Image (A) 2008 The Natural History Museum, by kind permission.

 

2).  Notopocorystes (Cretacoranina) cf. schloenbachia - Isolated carapace of a form with relatively subtle ornament (x3.0, Bridgewick Pit, near Lewes, Turonian, Booth Museum, BMB 018478, by kind permission of John Cooper).

 

 A  B

3).  Notopocorystes - Frontal views; (A) Notopocorystes normani - complete carapace retaining the right cheliped (x3.0, Grey Chalk, Dover, BMNH (British Museum (Natural History) London) 44346); (B) Notopocorystes sp. - a complete but slightly distorted carapace (x4.4, Sussex?, Potter Collection, Booth Museum, BMB 011208, by kind permission of John Cooper).  Image (A) 2008 The Natural History Museum, by kind permission.

 

4).  Notopocorystes normani - Left lateral view of a complete carapace retaining the right cheliped (x2.5, Grey Chalk, Dover, BMNH (British Museum (Natural History) London) 44346).  Image  2008 The Natural History Museum, by kind permission.