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100_9380
 

Tetradium

A large Endoceras proteiforme. From Decorah shale.  Only a little section of the shell remains on the lower half. The segmented part are septum and the smooth part are siphuncle. 


Photo Information for 100_9380

Taken with EASTMAN KODAK COMPANY KODAK DX7590 ZOOM DIGITAL CAMERA

  • 6.3 mm
  • 1/8
  • f f/2.8
  • ISO 140
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