Early Squirrel, Ischyromys typus, Fossil Jaw Section, Badlands, S Dakota I243

 
 

  
   Type:
  
  This is a fossil jaw section of the early Squirrel,
  
   Ischyromys typus
  
  .
 
 

  

 
 

  
   Locality:
  
  Private land in Pennington County, South Dakota
 
 

  

 
 

  
   Age:
  
  Oligocene, 30 Million Years Ago
 
 

  

 
 

  Note that ruler increments are 1/16 inch.
 
 

  

 
 

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