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        | Distinguishing Characteristics | 
       
      
                    
          -  Usually
              there are two posterior spines present.          
 
          -  Anterointermediate
              spines are rarely present, but reduced.          
 
          -  
                Length: lorica 135 - 350 µm, posterolateral spines 26-172 µm, anterolateral spines 25-60 µm, 
anterointermediate spines 
  2-5µm, anteromedian spines 15-25 µm. 
-  Width: lorica 73 - 118 µm. 
 
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